Through type heat recovery drying furnace device for gas waste heat of brazing furnace

Abstract

The invention provides a through type heat recovery drying furnace device for gas waste heat of a brazing furnace, and relates to the field of brazing furnaces. The through type heat recovery drying furnace device comprises a drying furnace body and a through hot flue gas channel. The hot flue gas channel is arranged at the bottom of the drying furnace body, and preheating of gas heating and waste hot flue gas generated by a heating area of the brazing furnace are introduced into the hot flue gas channel. The hot flue gas channel can generate an excellent preheating and heat preservation effect on the furnace bottom, the heat dissipation loss from the interior of the furnace to the exterior of the furnace is compensated, the occupied space of the hot flue gas channel outside the furnace is further saved, installation and debugging of a furnace chamber are facilitated, and meanwhile transportation is facilitated. The hot flue gas channel is provided with a flue gas outlet communicating with a conveying channel, hot flue gas in the hot flue gas channel is guided into the conveying channel on the front portion of the drying furnace through the flue gas outlet, the hot flue gas directly preheats a conveying mesh belt and a workpiece, finally, the hot flue gas is discharged out of the furnace at the same area temperature, the hot flue gas is utilized most sufficiently, and the effects of energy conservation and emission reduction are improved.

Description

technical field [0001] The invention relates to the field of brazing furnaces, in particular to a through-type heat recovery drying furnace device for gas waste heat of the brazing furnace. Background technique [0002] In recent years, most of the preheating furnace or heating zone of the atmosphere-protected aluminum brazing heat treatment furnace is heated by gas, and the combustion product-high-temperature flue gas carries a large amount of waste heat when it is discharged from the furnace, and the energy waste caused by direct discharge into the air is relatively large . [0003] The atmosphere protection aluminum brazing heat treatment furnace generally includes: preheating furnace or brazing heating zone, brazing zone, among which the preheating furnace or brazing heating zone is mostly heated by gas in recent years, and the process temperature of workpiece preheating or heating is 550°C, and the brazing process temperature is around 600°C. [0004] The upstream equ...

AI Technical Summary

Problems solved by technology

[0005] Most of the current drying furnaces use gas heating to preheat and dry the workpieces to be brazed, which not only consumes a lot of energy, but also makes it difficult to efficiently recycle the high-temperature flue gas in the heating zone; For hot workpieces, there is also the problem that the flue gas channel occupies a large space outside the furnace and the utilization efficiency of the hot flue gas is low; because the flux of the hot flue gas fluctuates greatly, it is easy to cause uneven heating of the preheated workpiece, and there is a lack of effective control means

Images