The usage method of energy conservation and consumption reduction in normal furnace

The normal furnace equipment has great energy-saving potential. The basic requirements for energy-saving equipment are to have a large melting furnace, beneficial utilization area ratio, uniform temperature area, high load capacity, good heating device, cheap energy, good heat transfer efficiency, good insulation ability, less heat loss, and higher thermal efficiency. The independent development and reasonable use of equipment can effectively carry out energy-saving production.
(1) Reasonable selection of energy:
(1) Clean and easy to control, such as resistance furnaces, indirectly heating workpieces with low thermal efficiency. It can increase thermal efficiency by enhancing radiation, reducing lining heat storage, and wall heat dissipation; Pulse ion nitriding furnace utilizes electrical energy to ionize low vacuum gas into ions. Under the action of an electric field, the workpiece is impacted at high speed. When heating the workpiece, it penetrates nitrogen elements into the workpiece. This heat treatment method has high thermal efficiency; Medium frequency induction heating. The crankshaft in an alternating electromagnetic field generates alternating current (eddy current) inside and instantly heats the surface of the crankshaft to a high temperature. It belongs to direct heating, with high thermal efficiency, up to 55% -90%. Induction quenching belongs to localized quenching, which saves nearly 80% -90% of energy compared to overall quenching.
(2) Using fuel is very cheap. Try to use natural gas or coal gas, which is a gas with a high calorific value. It can form flames on the nozzle burner and directly heat the workpiece through thermal shock, radiation, and convection. It has a high heat transfer coefficient and heating speed, therefore it has a high thermal efficiency. Desktop normalizing furnaces, continuous normalizing assembly lines, etc. use natural gas as a heat source to treat workpieces.
(2) Reasonable selection of furnace type:
After the batch and process of heat treatment products are determined, the selection of furnace type becomes the key to achieving process, energy conservation, and cost reduction. Continuous furnaces consume less energy than periodic furnaces, and the thermal efficiency of each furnace ranges from high to low: impact furnaces, vertical furnaces, conveyor belt furnaces, box furnaces, or desktop normalizing furnaces. When the batch size is large, a continuous furnace should be selected; When there are many varieties and few quantities, circulating furnaces are widely used.