Duct air heater plays a significant role in life and production. Its emergence greatly reduces the cost consumption during electric heating and provides good auxiliary effects for production and life.
With the development of the power industry and the introduction of new technologies, thermal power plants have changed the original hydraulic ash removal to dry ash removal, which not only saves a large amount of water resources and farmland but also enables coal ash to make further contributions to humanity. The duct air heater can use coal ash to produce cement, coal ash bricks, build roads, and also improve environmental pollution, benefiting the people.
The duct air heater is a new type of heating equipment specially used for the ash removal system of coal-fired power plants. It is suitable for heating the air in the air transport chute, the ash hopper aeration air of the electrostatic precipitator, and the ash silo aeration air. The equipment consists of an air electric heater body and a control system. The heating element uses 1Cr18Ni9Ti stainless steel tube as the protective sleeve, 0Cr27Al7MO2 high-temperature resistance alloy wire, and crystalline magnesium oxide powder, formed by compression process. The control part adopts advanced digital circuits, integrated circuit triggers, high-voltage thyristors, etc., to form an adjustable temperature measurement and constant temperature system, ensuring the normal operation of the electric heater. The heating element adopts a straight tube type instead of a U-shaped structure, and a special wrench can be used for easy installation and removal.
