沥青搅拌设备风压系统节能研究
发布时间：2018-09-08 12:48
【摘要】：风压系统作为沥青搅拌设备骨料烘干加热系统的关键组成，其除尘引风机的电能消耗是沥青搅拌设备运行中主要的能量消耗，除尘引风机的工作性能直接影响骨料的烘干效果与电能消耗，因此风压系统的研究对于减少能量消耗提高骨料烘干性能具有很重要的现实意义。 本文以某2000型沥青搅拌设备为例，概述了骨料烘干加热的过程和除尘引风机的作用，通过风压系统的风量与风压的计算，为除尘引风机的选型与调节提供了理论依据，对选择的风机与电机进行了分析，表明大气压力对风机的全压和轴功率有较大影响；分析了拖动电动机与风机的工作特性，确定风机系统能够稳定运行条件，保证了拖动系统的高效率运行；其次确定引风机的工况，对比了风量的风门调节和变速调节两种方式，表明了变速调节的节能优势，得出风门开度在80%以下时风机的变频调速具有节能效益，，并且分析了骨料含水率和排烟温度对引风机功率的影响，其中骨料含水率对风机功率消耗影响较大；研究了风机的变频调速控制方式，确定了风机拖动系统采用变频调速后的稳定性，提出了基于模糊自适应PID控制的风压系统的自动化控制，提高了风压系统的控制响应精度。
[Abstract]:The wind pressure system is the key component of the asphalt mixing equipment aggregate drying heating system, and the energy consumption of the dust collector is the main energy consumption in the operation of the asphalt mixing equipment. The working performance of dust extraction fan directly affects the drying effect and electric energy consumption of aggregate, so the study of wind pressure system is of great practical significance to reduce energy consumption and improve the drying performance of aggregate. Taking a certain type 2000 asphalt mixing equipment as an example, the paper summarizes the process of drying and heating of aggregate and the function of dust collecting fan. Through the calculation of air volume and pressure of air pressure system, it provides a theoretical basis for the selection and regulation of dust collecting fan. The analysis of the selected fan and motor shows that the atmospheric pressure has a great influence on the full pressure and shaft power of the fan, the working characteristics of the drive motor and fan are analyzed, and the stable operating conditions of the fan system are determined. The high efficiency operation of the drive system is ensured. Secondly, the working condition of the induced fan is determined, and the air valve regulation and the variable speed regulation of the air volume are compared, which indicates the energy-saving advantages of the variable speed regulation. It is concluded that the variable frequency speed regulation of the fan when the opening of the wind valve is below 80% has the benefit of energy saving, and the influence of aggregate moisture content and smoke exhaust temperature on the power of induced fan is analyzed, among which aggregate moisture content has a great effect on fan power consumption. This paper studies the frequency conversion speed control mode of fan, determines the stability of fan drive system after adopting frequency conversion speed regulation, and puts forward the automatic control of wind pressure system based on fuzzy adaptive PID control, which improves the control response precision of wind pressure system.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U415.52
[Abstract]:The wind pressure system is the key component of the asphalt mixing equipment aggregate drying heating system, and the energy consumption of the dust collector is the main energy consumption in the operation of the asphalt mixing equipment. The working performance of dust extraction fan directly affects the drying effect and electric energy consumption of aggregate, so the study of wind pressure system is of great practical significance to reduce energy consumption and improve the drying performance of aggregate. Taking a certain type 2000 asphalt mixing equipment as an example, the paper summarizes the process of drying and heating of aggregate and the function of dust collecting fan. Through the calculation of air volume and pressure of air pressure system, it provides a theoretical basis for the selection and regulation of dust collecting fan. The analysis of the selected fan and motor shows that the atmospheric pressure has a great influence on the full pressure and shaft power of the fan, the working characteristics of the drive motor and fan are analyzed, and the stable operating conditions of the fan system are determined. The high efficiency operation of the drive system is ensured. Secondly, the working condition of the induced fan is determined, and the air valve regulation and the variable speed regulation of the air volume are compared, which indicates the energy-saving advantages of the variable speed regulation. It is concluded that the variable frequency speed regulation of the fan when the opening of the wind valve is below 80% has the benefit of energy saving, and the influence of aggregate moisture content and smoke exhaust temperature on the power of induced fan is analyzed, among which aggregate moisture content has a great effect on fan power consumption. This paper studies the frequency conversion speed control mode of fan, determines the stability of fan drive system after adopting frequency conversion speed regulation, and puts forward the automatic control of wind pressure system based on fuzzy adaptive PID control, which improves the control response precision of wind pressure system.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U415.52
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相关期刊论文 前10条
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2 汪书苹;盛明s
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