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5~8t/h粉煤制备输送系统的设计与应用

Time: 2016/9/28 9:39:58

    近年来,随着生产发展和生产过程日趋自动化,对节约能源和环境保护的要求越来越高,有色冶炼烟化炉生产中用到的粉煤。在生产和输送过程中消耗很大的动力,粉煤细度控制不合理对设备的磨损也较为严重。输送方式不合理对设备的磨损也较严重。合理的粉煤制备和粉煤输送方式的工艺设计及设备的选择可以有效地控制煤粉的细度,减少设备的磨损,节约动力的消耗。创新机械在烟化炉系统中的粉煤制备及输送系统设计中采用了以下粉煤制备及输送系统。有效地控制了粉煤细度,减少了设备的磨损,节约了动力消耗。 一、粉煤制备  有色冶炼烟化炉生产中用到粉煤,而粉煤的制备系统中磨煤机有球磨机、中速磨煤机、竖井式磨煤机、锤击式磨煤机、风扇式磨煤机等[1],以球磨机生产煤粉的系统较稳定,生产能力较大,系统生产电耗较大,现在我国的所采用的球磨机系统中的煤粉分离多数采用粗、细粉分离器的形式来分离粗细煤粉。 粗细粉分离器是一种静态选粉机,分离效率非常低,据实际某几个厂的生产数据,一般为50%左右,通风阻力大,达1.0~1.2 kPa。粗粉分离器内部回粉经常堵塞,使煤粉变粗,飞灰可燃物增高,严重制约了煤磨的产量,导致煤磨产量低,制粉电耗高,机组经济性低[2]。而且粗粉分离器的细度调整是靠人工手动调节折流叶片的角度来实现的,这种调节方式灵敏性很差,往往粉煤细度难以调小。由于粗粉多至使粉煤输送、及喷吹设备磨损较快。给生产带来很大的不利。

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