土壤热脱附系统的控制策略及仿真  

Control Strategy and Simulation of Combustion Subsystem for Thermal Desorption Soil Remediation

作　　者：李运华[1] 蒋晖 杨丽曼[1] 沈东凯[1] LI Yun-hua;JIANG Hui;YANG Li-man;SHEN Dong-kai(School of Automation Science and Eletrical Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学自动化科学与电气工程学院

出　　处：《液压气动与密封》2019年第10期5-9,12,共6页Hydraulics Pneumatics & Seals

摘　　要：当下,土壤污染问题日益显著,土壤的安全问题引起社会广泛关注,社会各界都在寻求一种安全可靠的土壤修复方法。土壤热脱附是一种广泛用于处理土壤挥发性有机化合物(VOCs)的土壤修复方法。土壤热脱附修复涉及气体传输与流量控制问题。该文提出了一种将传统PID控制算法与Smith预估补偿器结合,同时联合气体流量相关计算的控制方法,有效地解决了土壤热脱附系统中温度滞后环节对系统稳定的问题,显着提高了系统的稳定性。根据仿真结果表明,提出的控制方法能显着增强系统的稳定性并能有效降低土壤中挥发性有机化合物。At present,the problem of soil pollution is becoming more and more obvious,and the safety of soil has caused widespread concern in society.All sectors of society are seeking a safe and reliable method of soil remediation.Soil thermal desorption is a kind of the method of soil remediation to be widely used to process the volatile organic compounds(VOCs)in the soil,and it concerns the transmission and flowrate control of the gas and wasted gas.In this paper,a control algorithm based on traditional PID control algorithm combined with Smith predictor compensator and calculation on flow rate control of gas could effectively deal with the impact of large hysteresis in combustion system and significantly improve the stability of the system.The simulation results show that the proposed control method significantly enhanced system stability and effectively decrease the volatile organic compounds to be present in the soil.

关 键 词：土壤热修复 气体输送与流量控制 SMITH预估补偿器 控制策略 仿真 

分 类 号：TH138[机械工程—机械制造及自动化] TP23[自动化与计算机技术—检测技术与自动化装置]