(1) Basic information

(1) Basic information

The new high-frequency electromagnetic heating system uses an electromagnetic induction heating controller to convert 220V or 380V, 50Hz alternating current into high-frequency and high-voltage electricity with a frequency of 20- 40KHz. When the high-speed changing high-frequency and high-voltage current flows through the coil, a high-speed changing alternating magnetic field will be generated. When the magnetic field lines in the magnetic field pass through the magnetic conductive metal material, countless small eddy currents will be generated in the metal body, causing the metal material itself to quickly heat up. thereby heating the contents of the metal material barrel. At the same time, it is combined with high-efficiency insulation devices to minimize heat loss, which can achieve significant power saving. Using this heating method, the energy conversion efficiency is as high as 90~95%, with an energy-saving effect of 30%-70%) The heating part adopts a special cable structure, which can withstand temperatures above 500 ° C. The main machine adopts the most advanced industrial machine board at present. The internal heat method is safely and stably used, and the ambient temperature is reduced from the original 100 ° C to normal temperature, with a service life of up to 10 years.

(2) Product introduction

a) Efficient energy saving, saving 30%-70%

Electromagnetic heating heats the object by converting electrical energy into magnetic energy. Using internal heating method, the barrel heats itself. In addition, the insulation layer outside the barrel blocks the loss of heat and avoids the traditional resistance wire heating method that only has one side close to the barrel. Heat, that is, up to 50% of the heat is conducted into the barrel, and more than 50% of the heat is lost to the air. The thermal efficiency is as high as over 95%. After strict experimental testing, it can save more than 30% of electricity.

b) Rapid heating, preheating increases by 60%

Electromagnetic heating makes the barrel heat by feeling the vortex formed by high-frequency current at the bottom of the container. The heating starts quickly and shortens the preheating time of 2\3.

c) Reduce production costs and improve product quality

The electromagnetic heater adopts a specially made cable structure that is resistant to high temperatures and high pressures, which can withstand high temperatures of more than 500 degrees. Since the cable itself does not generate heat, it has a long service life, which can reach more than 5 years. It avoids the disadvantages of resistive heating requiring frequent maintenance and regular replacement of heating rings. This product has basically no maintenance costs in the later period.

(3) Product application areas

It is widely used in various industrial fields such as heating, heat treatment, welding, annealing, quenching, etc., and automobiles.

(4) Application cases

Shanghai Rensheng Standard Parts Manufacturing Co., Ltd.

1) Implementation content and cycle: Use induction electric heating annealing furnace to replace the original resistance heating annealing furnace in the production system, and update and upgrade the supporting system equipment. The project officially began to be renovated on January 4, 2017, and was completed on December 31, 2017.

2) Energy conservation and emission reduction effect and investment payback period: The energy conservation amount of this project is 2385 tons of standard coal. If it is uniformly converted into electricity, the annual electricity saving can reach 8.28 million kWh. The unit price of electricity is calculated based on 0.8 yuan/kWh. The project can save 6.624 million yuan. The investment amount of this project is 7.40175857 million yuan, so the investment payback period of this project is 1.1 years.