Anwendung des Frequenzumrichters im Kessellüfter
With the development and progress of China's society, people pay more and more attention to environmental protection. The state is strengthening the strength and guidance of environmental protection, and manufacturing enterprises at the forefront of social production have begun to focus on energy conservation and emission reduction. Among them, boiler equipment, which is widely used in industrial production and people's life, has become a necessary upgrade measure for energy saving and consumption reduction and environmental protection transformation.
For boiler equipment, the induced draft fan is one of the important control process elements. The induced draft fan is mainly used to remove the flue gas generated in the furnace and maintain a certain negative pressure in the furnace to overcome the pressure loss in the tail flue. The above effects of energy saving and consumption reduction and environmental protection can be achieved through the application of frequency converter speed regulation.
Process principle
The speed n of the asynchronous motor is proportional to the frequency f, and the speed of the motor can be changed as long as the frequency f is changed. The induced draft fan is a typical fan load with variable torque control characteristics. Therefore, according to the relationship between the fluid flow and the speed of the fan, the flow Q is proportional to the first power of the fan speed n; the motor torque M is proportional to the square of the speed n; the motor output power P is proportional to the cube of the speed n.
According to the above principle, the running speed of the induced draft fan motor can be adjusted according to the requirements of the boiler process, and the output current, voltage and power can be changed to achieve the effect of energy saving. There will be no throttling loss and negative pressure fluctuations in the furnace like traditional windshield adjustment baffles.
