A controllable atmosphere heating furnace

Abstract

The invention discloses a controlled atmosphere heating furnace. The controlled atmosphere heating furnace comprises a seal box, a control box and a heating system, vertical tracks are respectively positioned on the inner walls of two edges of a door in the seal box; a base plate is mounted on the tracks; the matching part of the base plate and the inner wall of the seal box is movably sealed through sealing rubber; the base plate is driven by a motor arranged outside the seal box through a gear rack; a one-way air outlet valve, a one-way air inlet valve and an electric spark generating device are arranged on the seal box; the air inlet valve is connected with a special atmosphere box through a pipeline. The controlled atmosphere heating furnace overcomes the disadvantages in the prior art, and is reasonable in structural design; the base plate moving up and down is arranged in the heating furnace, a workpiece is put on the base plate, the base plate moves upwards to exhaust air through the one-way air outlet valve, oxygen in the residual space is consumed through ignition of the electric spark generating device, and the base plate moves downwards to suck special gas as an atmosphere shielding gas through the one-way air inlet valve, so that the controlled atmosphere heating furnace is simple and practical in working principle, simple to maintain, high in work efficiency and wide in application range.

Description

technical field [0001] The invention relates to the technical field of heat treatment heating furnaces, in particular to a controllable atmosphere heating furnace. Background technique [0002] At present, at least one pair of regenerative burners are installed on both sides of the furnace body for regenerative non-oxidation heating furnaces used in metallurgical strip continuous annealing production lines and hot-dip galvanizing production lines. A common premixing chamber is set at the front end, and a secondary combustion air duct is set outside the premixing chamber. By controlling the air flow on one side, the fuel on this side is not completely combusted, and reducing gas is formed in the furnace body and floats toward the furnace. On the other side of the body, the air is input through the secondary combustion air pipe on this side, the fuel is completely burned on this side, and the combustion smoke is discharged after passing through the heat storage tank on this si...

AI Technical Summary

Problems solved by technology

[0002] At present, at least one pair of regenerative burners are installed on both sides of the furnace body for regenerative non-oxidation heating furnaces used in metallurgical strip continuous annealing production lines and hot-dip galvanizing production lines. A common premixing chamber is set at the front end, and a secondary combustion air duct is set outside the premixing chamber. By controlling the air flow on one side, the fuel on this side is not completely combusted, and reducing gas is formed in the furnace body and floats toward the furnace. On the other side of the body, the air is input through the secondary combustion air pipe on this side, the fuel is completely burned on this side, and the combustion smoke is discharged after passing through the heat storage tank on this side, and then reversed, repeat this process on the other side process, forming non-oxidation heating in the furnace body, such as CN1240985C, which discloses such a non-oxidation heating furnace, and to realize real non-oxidation heating in the furnace body, it is essential to accurately control the equivalent ratio of air and gas Therefore, the patent CN201538799U appeared, adding flow meters and regulating valves to each air pipe and gas pipe to achieve accurate control of the air-fuel ratio, but because all the regenerative burners on one side of the furnace share the same premixing chamber, making The premixing chamber has a large space, so when the air and gas are mixed in the shared premixing chamber through the corresponding pipes, the mixing ratio of air and gas is not accurate, and it is difficult to achieve a truly redox-free atmosphere

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