基于逐级递推回流控制的压缩机负荷连续调节系统研究  

A continuous capacity regulation system for a reciprocating compressor based on stage-by-stage recursive backflow control

作　　者：王瑶 张进杰 周超 刘雯华 WANG Yao;ZHANG JinJie;ZHOU Chao;LIU WenHua(Diagnosis and Self-Recovery Engineering Research Center, College of Mechanical and Electrical Engineering Beijing University of Chemical Technology, Beijing 100029, China)

机构地区：[1]北京化工大学机电工程学院诊断与自愈工程研究中心,北京100029

出　　处：《北京化工大学学报（自然科学版）》2018年第3期84-89,共6页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家重点研究发展计划(2016yff0203301);中央高校基本科研基金(zy1617)

摘　　要：针对石化工艺生产中产量变化时压缩机无法连续调节负荷造成的能量浪费问题,设计了一种基于可编程逻辑控制器(PLC)控制的压缩机负荷连续调节电液系统,主要由S7-300 PLC、电液控制阀、液压驱动器和液压动力单元等组成。系统采用局部行程压开进气阀的控制原理,实现了压缩机负荷在0~100%范围的全量程连续调节,并根据实际工艺流程需求设计了逐级递推式的PID控制回路。该系统能够根据后端工艺的需求自动调节压缩机负荷,保证了工艺量的稳定,同时避免了原打回流方式造成的能量浪费。In view of the problem of energy waste caused by the failure of a compressor to continuously adjust its output during a change in a petrochemical process,a continuous regulating electro-hydraulic system based on a programmable logic controller(PLC） has been designed. The main components of the system comprise a S7-300 PLC,electro-hydraulic control valves,hydraulic drivers and a hydraulic power unit. The system adopts releasing the suction valve during a partial stroke as its control principle,and continuous regulation over the range 0-100%can be achieved. In addition,a stage-by-stage recursive PID control method was designed according to the actual process demand. The system can automatically adjust the compressor load according to the demand of the back-end process,thus ensuring the stability of the process quantity,and avoiding any energy waste caused by the original backflow.

关 键 词：往复压缩机 连续负荷调节 可编程逻辑控制器 逐级递推控制 节能 

分 类 号：TH457[机械工程—机械制造及自动化]