No-open-flame fuel gas uniform-temperature heating device

Abstract

The invention discloses a no-open-flame fuel gas uniform-temperature heating device, and belongs to the technical field of heat treatment. The heating device comprises a heating furnace, a fuel gas nozzle and a uniform temperature flame isolation box. The uniform temperature flame isolation box is arranged at the lower portion of the heating furnace and located above the outlet position of the fuel gas nozzle. Smoke distribution holes are evenly distributed in the uniform temperature flame isolation box. The fuel gas nozzle is arranged on the lower furnace wall of the heating furnace. A feeding port is formed in the upper portion of the heating furnace, and through the feeding port, a heated workpiece is placed above the uniform temperature flame isolation box. The uniform temperature flame isolation box is used for isolating flames from the heated workpiece, the flame and high-temperature smoke are diffused after entering the uniform temperature flame isolation box, the high-temperature smoke evenly ascends to heat the heated workpiece, meanwhile, open flames are isolated by the uniform temperature flame isolation box, the heated workpiece cannot be directly exposed to open flame radiation, and therefore the temperature of the workpiece cannot be uneven.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of heat treatment, and in particular relates to a gas uniform temperature heating device without an open flame. [0003] Background technique: [0004] In the heating process of some workpieces, the workpiece is slowly heated at a temperature below 600°C and kept warm for a long time. The workpiece is very sensitive to changes in surface temperature and core temperature. If it is uneven, it will easily cause uneven internal organization of the workpiece, or even become substandard products. At temperatures below 600°C, convective heat transfer is dominant, and radiation heat transfer is supplemented. However, when gas heating is used, the open flame generated by the gas flame becomes a prominent heat radiation source, and the heat radiation intensity of this radiation source is due to the workpiece. The difference in distance and angle is obviously uneven, especially the workpiece moves very slowly. ...

AI Technical Summary

Problems solved by technology

[0004] In the heating process of some workpieces, the workpiece is slowly heated at a temperature below 600°C and kept warm for a long time. The workpiece is very sensitive to changes in surface temperature and core temperature. If it is uneven, it will easily cause uneven internal organization of the workpiece, or even Become a non-conforming product

At temperatures below 600°C, convective heat transfer is dominant, and radiation heat transfer is supplemented. However, when gas heating is used, the open flame generated by the gas flame becomes a prominent heat radiation source, and the heat radiation intensity of this radiation source is due to the workpiece. The difference in distance and angle is obviously uneven, especially the workpiece runs very slowly. If it stays near a gas burner for a long time, the temperature of the workpiece will be seriously uneven, and even become a waste product.

[0005] The use of gas burners is affected by air pressure fluctuations, which will cause fluctuations in the heating capacity of the burners, resulting in fluctuations in the heating temperature, which is not allowed in the heating requirements of some workpieces, and air gas pressure fluctuations are inevitable, only in The overall remains constant in a large cycle, the problem is to control the fluctuation of air gas pressure, which requires a lot of investment and the effect is not good

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