Application of electric heating in industry and agriculture

With the advancement of science and technology, electric heating is playing an increasingly important role in industry and agriculture. Electroprocessing, which directly applies electrical energy to production processes, is a new technology that is gradually gaining popularity and represents a major innovation in modern industrial production. Currently, electroprocessing in industrial and agricultural production includes various methods such as electrothermal, electrochemical, electric pulse, and electrocorrosion. Among these, electrothermal is the earliest and most widely used.

In heavy industry, the application of electric heating in metal heat treatment ensures extremely uniform heating of metal structures and precise heating temperatures, improving heat treatment quality. Furthermore, electric heating equipment can be easily enclosed, maintaining the required gas or vacuum within. Electric heating also allows for localized heating of specific parts or surfaces of a workpiece. Consequently, specialized heat treatment equipment is increasingly appearing in mechanical manufacturing, as well as in ferrous, non-ferrous, and light metallurgy. In the foundry industry, in particular, technological advancements are driving the increasing use of complex shapes, thin walls, and minimal or no cutting in castings. This significantly reduces material consumption and labor hours, resulting in lower costs. However, to ensure that the molten metal quickly fills the mold cavity and maintains its heat for optimal fluidity, molds are often designed with electric heating devices.

In light industry, electric heating has become an essential new process technology for heating and drying processes for food, wood, paper, cotton, and textiles, as well as printing and dyeing. Whether in the traditional rubber vulcanization process (for example, single-head electric heating tubes used in vulcanization equipment) or the emerging plastics industry, electric heating is essential for both compression and injection molding (for example, profile extruder heating tubes). Uniform heating of all mold components is particularly crucial for complex products or processes with multiple molds (for example, mold electric heating tubes).

In the petrochemical industry, the use of electric heating for heating and insulation of crude oil pipelines, paint drying, and fertilizer refining has reduced project investment and operating costs.

In agriculture, with the development of modern technology and the gradual specialization of agriculture, electric heating has also been widely used in seedling cultivation, silkworm and mulberry incubation, fish fry cultivation, chicken hatching, and high-quality seed breeding. After using electric heating and humidification, the indoor air is fresh, the working environment is greatly improved, the silkworm eggs are uniform, and the rate of emergence is significantly improved.