Application scope and advantages of air heaters

Electric air heaters utilize heat exchange devices that convert heat into heat. They offer convenient energy supply, compact design, automatic temperature control, ease of installation and maintenance, and pollution-free operation. The air heater structure consists of a tubular container and an electric heating element, accompanied by a temperature control cabinet (or stand). The control unit utilizes leading-edge digital circuitry, integrated circuit triggers, and high-reverse-voltage thyristors (SCRs) to form an adjustable temperature measurement and constant-temperature system, ensuring the heater's proper operation. The heating element uses a straight tube design instead of a U-shaped structure, and a dedicated plate holder facilitates installation and disassembly. Temperature control utilizes SCRs with a PID digital display. Within the control range, the desired temperature can be set and automatically maintained within ±5°C. It also features an over-limit audible and visual alarm, multiple protection features, and can be controlled locally or remotely.

Electric air heaters are primarily used to heat air from a desired initial temperature to the desired temperature, up to 850°C. They are widely used in research and production laboratories in aerospace, weapons, chemical, and university settings. They are particularly suitable for testing high-flow, high-temperature integrated systems and accessories with active temperature control. Electric air heaters have a wide range of applications: they can heat any gas, generating hot air that is dry, moisture-free, chemically non-corrosive, non-polluting, non-conductive, non-flammable, non-explosive, safe and reliable, and provides a rapid (and controllable) temperature rise in the heated space.

Air heaters are a new type of heating equipment specifically designed for use in coal-fired power plant ash handling systems. They are suitable for heating aeration air from power plant air transport chutes, electrostatic precipitator ash hoppers, and ash silos. The equipment consists of the electric air heater and a control system. The heating tubes offer excellent thermal conductivity and insulation, and the heater is equipped with internal deflectors for uniform heating. The electric air heater control cabinet features interlocking control with the aeration fan, as well as local and remote control interfaces. The control cabinet automatically adjusts lubrication when the system is restarted after a sudden shutdown.