Quenching furnace smoke outlet heat energy recovery system of mesh heating furnace production line

Abstract

The invention provides a quenching furnace smoke outlet heat energy recovery system of a mesh heating furnace production line. The system comprises a quenching furnace, a quenching tank, a tempering furnace and a blackening tank which are sequentially connected, the quenching furnace is provided with a gas discharge tube, the gas discharge tube is provided with a second-stage heat energy recovery device, the second-stage heat energy recovery device comprises a heat collecting tube, a fan and a wind regulating valve, the heat collecting tube is provided with a heat connecting branch tube connected with the gas discharge tube of the quenching furnace in a branch manner, the fan is arranged on the heat collecting tube, the wind regulating valve is arranged at the outlet end of the fan, the outlet end of the wind regulating valve is divided into a first branch and a second branch, the outlet end of the first branch faces the inlet of the tempering furnace, the outlet end of the second branch faces the outlet end of the blackening tank, and a heat insulation layer is arranged outside each of the heat collecting tube, the heat collecting branch tube, the first branch and the second branch. The quenching furnace smoke outlet heat energy recovery system of the mesh heating furnace production line has the advantages of heat energy discharge reduction, reduction of the heat pollution to surrounding environment, energy saving, environmental protection, and substantial reduction of the production cost.

Description

technical field [0001] The invention relates to a bolt production equipment, in particular to a heat energy recovery system for a quenching furnace exhaust port of a mesh belt heating furnace production line. Background technique [0002] After the bolt is machined, it should be quenched, tempered and blackened to improve its mechanical strength and corrosion resistance. In the traditional process, a resistance furnace is usually used for processing. The bolts are heated to 850-870°C through the quenching furnace, and quenched by oil cooling, and then transported to the tempering furnace by a conveyor belt for tempering treatment. The black tank is blackened, and then dried after blackening. In order to improve the quenching effect, the bolt oil is usually cooled to normal temperature, and then enters the tempering furnace for tempering. The tempering temperature is 500-650°C, and the normal temperature bolts need a preheating process to reach this temperature when entering...

AI Technical Summary

Problems solved by technology

In order to improve the quenching effect, the bolt oil is usually cooled to normal temperature, and then enters the tempering furnace for tempering. The tempering temperature is 500-650°C, and the normal temperature bolts need a preheating process to reach this temperature when entering the tempering furnace, thus reducing the bolt tempering. The time of fire; a heater with a power of 40-50KW is needed at the outlet of the blackening tank to dry the blackened bolts, which consumes a lot of power; on this assembly line, the high-temperature gas discharged from the quenching furnace Exhausted from the outlet pipe, the gas is usually combustion gas, so the temperature is high, usually around 500°C, the energy loss is very serious, and it causes serious thermal pollution to the environment

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