Introduction to the working principle, advantages, and application of air electric heaters

Introduction to the working principle, advantages, and application of air electric heaters

Advantages:

1. Through continuous circulation of the working fluid, the flue gas is cooled and the air heating effect is good, without the need for steam consumption. The power consumption of the air electric heater circulation pump is only 10kW, which is extremely small compared to the heat recovery power in the flue gas.

2. The air electric heater system is operating at low pressure, with hot water as the medium and low temperature.

3. Increase wall temperature, reduce smoke corrosion, and prevent dust blockage. No need to set up a soot blower.

Compared with the air heater heat pipe type, it only has a circulating pump installed, which consumes a certain amount of electrical energy, but it is easy to operate, safe and reliable.

5. The arrangement of the air electric heater is convenient, and there is no need to modify the smoke and air ducts. Due to the thermal power requirements of the air electric heater heat pipe, it is generally required that the air duct where the heater is located is higher than the flue. The forced circulation system of the air electric heater can be arranged according to the on-site conditions, and the difference in pipeline resistance caused by different position combinations can be solved by selecting a reasonable pressure head of the air electric heater circulation pump.

6. The power of the air electric heater circulation pump is 10kW, which is equivalent to 4kg/h of standard coal, and its heat is equivalent to the enthalpy of 30kg of steam.

Application:

The power of an air electric heater is determined based on the calculation of air volume and temperature rise. If the air volume and temperature rise meet the requirements, it is not advisable to use excessive air volume and temperature rise. Excessive air volume and temperature rise can directly lead to excessive power of the heater and increase energy consumption. Excessive air volume and temperature rise are unnecessary. We need to consider comprehensively, design reasonably, and determine appropriate parameters. When using an air heater, only the pipeline at the outlet of the electric heater is insulated, and no insulation treatment is applied to the surface of the heater itself. Comparative data shows that adding insulation layer on the surface of the air heater can reduce energy consumption by 5% to 10%. Long term operation can save significant energy consumption. It is recommended to install insulation layer on the air heater while installing insulation layer on the pipeline.

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