Energy-saving annealing furnace

Abstract

The invention discloses an energy-saving annealing furnace which comprises a furnace body, the furnace body comprises a thermal insulating wall and a furnace door, the thermal insulating wall comprises an external wall board, an internal wall board and thermal insulating cotton filled between the external wall board and the internal wall board, and the furnace door is mounted on the thermal insulating wall through a lifting device. The energy-saving annealing furnace further comprises a circulation heating system, the thermal insulating wall also comprises a thermal-insulating aluminum foil, a plurality of screw rods and a plurality of nuts, the circulation heating system comprises a heating fan, a hot air pipe, an air return pipe, a negative pressure fan and a negative pressure air pipe, and the thermal insulating cotton comprises a first thermal insulating cotton layer and a second thermal insulating layer. The energy-saving annealing furnace has the advantages of simple structure, convenience in operation, good energy-saving effect, safety and reliability in use and longer service life.

Description

technical field [0001] The invention relates to an energy-saving annealing furnace. Background technique [0002] The annealing furnace is a metal heat treatment process in which metal materials or parts are slowly heated to a certain temperature in different annealing furnaces, kept for a period of time, and then cooled at an appropriate speed. The purpose is to soften the material or workpiece after casting, forging, welding or cutting, reduce the hardness, improve plasticity and toughness, homogenize the chemical composition, remove residual stress, or obtain the expected physical properties. [0003] The continuous bright annealing furnace is mainly used for continuous bright annealing of different specifications of copper straight pipes (rods), steel pipes, aluminum pipes or disks under controlled atmosphere. With the extensive use of aluminum products such as aluminum foil and aluminum coils in daily life, the lightweight development of automobiles and other equipment...

AI Technical Summary

Problems solved by technology

However, existing annealing furnaces generally have disadvantages such as poor heat insulation effect, high energy consumption, and rapid heat loss. The cotton is directly fixed on the outer wall panel, and the insulation wall made of refractory bricks is bulky and has poor insulation effect; the stainless steel lining and insulation cotton are directly fixed on the outer wall. Although this structure can also play a certain role in insulation, due to the anchorage The nails are in direct contact with the outer wall panels, and the heat in the furnace will be directly transferred to the outer wall panels along with the anchor nails. When the anchor nails are dense, it will also cause a large amount of heat dissipation on the insulation wall. At the same time, the hot air in the furnace will pass through the insulation cotton. The heat transfer occurs directly between the gap and the outer wall of the insulation wall, which affects the insulation effect of the insulation wall and reduces the temperature in the annealing furnace; 2. The heating system mainly adopts the method of heating the furnace wall with resistance wires or natural gas combustion to heat the air and then passes the hot air through In the way of heating in the furnace, the former consumes a lot of power when the resistance wire is burned, and the energy saving effect is not obvious; the exhaust gas will take away a lot of heat when the latter is burned, and the energy loss is large.

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