Mesh belt type gas brazing furnace and energy saving method

Abstract

The invention provides a mesh belt type gas brazing furnace and an energy saving method. The mesh belt type gas brazing furnace comprises a feeding section, a brazing furnace heating furnace body anda heating furnace body muffle, wherein a preheating section is arranged between the brazing furnace heating furnace body and the feeding section in a communicating mode, a heat flow recovery channel is arranged between the preheating section and the brazing furnace heating furnace body, a preheating section muffle is arranged in the preheating section, and shielding gas is injected to the preheating section muffle. By additionally arranging the preheating section, workpieces and a mesh belt of the preheating section is heated by hot gas exhausted out of the heating furnace body, part of heat is transmitted to a nozzle combustion-supporting air through a heat exchanger, the temperature of the combustion-supporting air is increased, the nozzle actual using power of the heating furnace body is reduced, the natural gas consumption is reduced, the production cost is reduced, and the situation that heat is scattered to air to cause waste is avoided.

Description

technical field [0001] The invention belongs to the technical field of brazing furnaces, and in particular relates to a mesh-belt gas brazing furnace and an energy-saving method. Background technique [0002] The mesh belt brazing process is to fix the workpiece and different forms of solder together in a certain way, put them into the feeding end of the brazing furnace, and bring the workpiece into the brazing furnace by the mesh belt according to the requirements of the brazing process. The solder melts the solder to fill the gaps of the workpiece at a certain heating rate and cooling rate to form a full and bright weld. At present, the heating furnace body adopts electric heating and gas burner heating, but the cost of electric heating is higher than that of gas heating. Therefore, in In areas with tight power supply and rich gas resources, gas heating is generally used to save operating costs. [0003] However, when heating with a gas brazing furnace, there are the foll...

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Problems solved by technology

[0004] 1. Mesh belt type gas brazing furnace has no preheating section, the workpiece directly enters the heating section for heating, the burner has high power and energy consumption;

[0005] 2. The working temperature of the heating furnace body is about 1000°C, and the temperature of the hot gas discharged is about 900°C. The exhaust of the hot exhaust gas causes waste, and the remaining heat cannot be fully utilized, and the thermal efficiency is low

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