秸秆立式环模成型机温度控制系统设计

The Control System Design of Conditioning Temperature about Vertical Ring Moulding

秸秆成型过程中,物料的特性是影响成型产品质量和成型能耗的主要原因之一,在不同温度下,物料的塑性、强度和耐磨性会发生变化,适宜的温度可提高物料的塑性,降低耐磨性,提高了秸秆成型产品质量和降低成型能耗。多变的环境状态使人工控制理想温度是十分困难,系统利用Pt100温度传感器检测调质室出口温度,用集成PID控制器的PLC来对调质室温度计算,输出控制信号来控制比例调节阀DN15-200,实现温度的自动控制。实验原料选定含水率为18%的10 kg玉米秸秆,成型燃料密度设定为1.2 g/cm3,分别对未加温度控制系统的成型设备和进行调质室温度控制系统的成型设备进行仿真实验,系统能耗降低为原来的68.7%,生产率提高了36.8%,为推动秸秆成型系统的自动化和产品的产业化发展提供帮助。

The feature of material is one of main causes to affact forming quality and energy consumption in the process of briquetting. Research shows that the plastic, strength and wear resistance of material is variable dependent on different temperature. The appropriate temperature can improve the plasticity of material and reduce the abrasion resistance, improve the product quality and reduce energy consumption. The changeful environment condition makes artificially control temperature under ideal condition difficult. The design applies Ptl00 temperature sensor to detect the outlet temperature of the modulator. A PLC of integrating PID controller is used to calculate refining temperature and output the control signals to control the DN15-200 proportional valve. Thus the automatic control of temperature is achieved. The corn stalks （ 10 kg） with moisture content of 18% were used as experimental materials. The simulation experiments were carried out on a control system without temperature equipment and system equipment with temperature control when the product density was set at 1.2 g/cm3. The energy consumption was decreased to 68.7% and the production rate was increased to 36. 8% of the system. This could offer helps to promote automation of the straw briquette system and industrialization of products.