In workshops, after several steam boilers were converted to electric heating, large temperature differences and fluctuations in pipelines, along with low heat transfer efficiency, are common feedback during procurement. When selecting an industrial electric heating furnace, it is necessary to first clarify the relationships among process temperature, heat transfer medium type, and operating costs.
Liquid-phase closed-loop electric heating furnaces operate at atmospheric pressure, with the heat transfer medium circulating in a sealed pipeline and no steam discharge generated. Under the same heat output, blowdown, condensate, and heat dissipation losses are reduced, and the heat utilization rate can reach over 98%. Steam boilers require continuous water replenishment, blowdown, and pressure maintenance, so their comprehensive heat loss is relatively higher. For heating processes from 0 to 350°C, the liquid-phase circulation method has certain advantages in energy consumption control.
The common operating temperature range of industrial electric heating furnaces is 0~350°C, and some designs can cover up to 400°C. During procurement, the following should be confirmed: the maximum temperature actually required by the material or mold, the heating rate, and the temperature control fluctuation range. If the temperature range is selected too wide, equipment volume and investment increase; if selected too narrow, it is difficult to cover the process margin. It is recommended to use the process peak temperature plus 20~30°C as a reference for selection.
Liquid-phase circulating electric heating furnaces do not require boiler rooms, chimneys, water treatment, or other supporting facilities, so equipment investment is relatively lower, and operation produces no combustion emissions. Maintenance focuses on circulation pumps, electric heating elements, and pipeline seals. Compared with steam systems, long-term expenditures such as annual boiler inspections, boiler operators, and soft water treatment are eliminated. During procurement, local electricity prices and steam prices can be combined to calculate operating costs before deciding on a solution.
The GDY-350 model is suitable for occasions requiring a stable heat source, such as plastic machinery, die-casting molds, and reactor jackets, and can be custom-designed to match the power and interface dimensions of the heat-using equipment.
