Thermal treatment furnace for steel wires

Abstract

The invention discloses a thermal treatment furnace for steel wires, and relates to the technical field of thermal treatment of the steel wires. The front of a heating section is arranged to be of a hot air type structure, a front nozzle is a hot air nozzle, and the input end of the nozzle is connected to air pipes and gas pipes; the rear of the heating section is arranged to be of a premixing type structure, a rear nozzle is a premixing nozzle, and the air pipes and the gas pipes are connected to a pre-mixer and then are connected to a premixing nozzle through mixed gas pipes; a furnace body is provided with a discharge flue, and the discharge flue is provided with an induced draft fan. When the external atmospheric pressure changes, the induced draft fan still can maintain certain gas displacement, and therefore smoke inside the furnace can become stable, the atmospheric pressure can keep stable, and the thermal treatment effect of the steel wires can be guaranteed. In addition, the hot air type structure and the premixing type structure are matched, the furnace atmosphere can be accurately controlled, the oxidation degree of the steel wires can be lower, the waste heat of the smoke can be fully utilized, and the energy utilization rate can be increased.

Description

technical field [0001] The invention relates to the field of steel wire heat treatment equipment, and specifically provides an open flame furnace for steel wire heat treatment. Background technique [0002] At present, there are generally two types of heat treatment furnaces for steel wire, one is hot air heat treatment furnace, and the other is premixed heat treatment furnace. Open flame furnace can preheat the air with the heat of flue gas through the heat exchanger installed inside the flue The air in the pipe can reduce the flue gas temperature and reduce energy consumption. The pre-mixed heat treatment open flame furnace can change the size of the gas inlet by rotating the adjustment sleeve, so as to precisely adjust the ratio of gas to air, and then accurately control each heating of the open flame furnace. The atmosphere in the section ensures that the oxidation amount of the steel wire is smaller during the heating process and ensures that the steel wire does not dec...

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Problems solved by technology

[0003] However, whether it is a hot air heat treatment furnace or a premixed heat treatment furnace, or a combination of the two, the flue exhaust is a passive exhaust flue, that is, the flue gas in the furnace chamber is directly discharged into the air through pipes and chimneys. , the emission of flue gas is greatly affected by the external atmospheric pressure, and the emission of flue gas is unstable, which affects the air pressure and gas content in the furnace cavity, and affects the treatment effect of steel wire

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