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1 风机、水泵变频调节的必要性目前,随着国民经济的快速发展,节能降耗,提高能源利用率是亟待解决的重要课题。取暖锅炉运行,取暖期一般分为冬初、严冬和冬末3个阶段,其间室外温度变化很大,在满足室内温度的同时,要适当调整锅炉的输出热量(进煤量、鼓引风量和循环水量等。)当室外温度较高时,进煤量、鼓引风量和循环水量都要相应减少。传统方法的风机系统负荷调节大都采用节流方式,通过改变风机进口挡板的开度,保持风机转速不变,人为的改变风机的流量及风压,而此时风机消耗的轴功率却没有减少,造成了节流损失。电机长期满负荷运行浪费了大量电能,又减少了设备的使用寿命。当风机系统采用变频调节时,风门挡板开度保持最大,通过改变风机转速,在其管路阻力特性曲线不变的情况下,改变
1 fan, pump the need for frequency control At present, with the rapid development of the national economy, energy saving, improve energy efficiency is an important issue to be solved. Heating boiler operation, the heating period is generally divided into early winter, winter and winter end of the three stages, during which the outdoor temperature varies greatly, while meeting the indoor temperature at the same time, to adjust the output of the boiler heat (into the amount of coal, Circulating water volume, etc.) When the outdoor temperature is high, the amount of coal, the amount of induced draft and circulating water should be reduced accordingly. Traditional methods of fan system load regulation are mostly throttling mode by changing the fan inlet baffle opening to maintain constant fan speed, artificially change the fan flow and wind pressure, while the fan shaft power consumption did not decrease , Resulting in a throttling loss. Long-term operation of the motor wasted a lot of power at full capacity, but also reduces the service life of equipment. When the fan system uses frequency conversion regulation, the damper flap opening remains the largest, by changing the fan speed, the line resistance characteristics of the same circumstances, change