一种新的纸机干燥部蒸汽冷凝水热泵控制系统  

A Novel Steam-driven Jet Heat Pump Control System for Drying Section Steam & Condensate System of Paper Machine

作　　者：汤伟[1] 李清旺[2] 王孟效[2] 

机构地区：[1]陕西科技大学造纸工程学院,陕西咸阳712081 [2]陕西科技大学电子与信息工程学院,陕西咸阳712081

出　　处：《化工自动化及仪表》2007年第3期62-67,共6页Control and Instruments in Chemical Industry

基　　金：国家留学基金委西部项目(200521S023);陕西科技大学科研团队建设项目(20050601)

摘　　要：简要介绍纸幅干燥原理和热泵节能机理,设计一套基于S7-300 PLC的五叠网涂布白板纸机蒸汽冷凝水热力控制系统,阐述具体的控制方案和采用的控制算法,其中主要包括热泵组的压力分段控制和热泵开度的低端选择控制、湿端低温段烘缸组压力回路分段控制、热烘箱二次蒸汽回收压力回路的分程控制和成纸水分的串级控制。实际应用效果表明该控制系统方案是可行的,同时也是有效的。After briefly introducing the paper sheet drying principle and the energy-saving mechanism of steam-driven jet heat pump,a SIMATIC S7-300 PLC based steam ＆ condensate thermodynamic control system for a five-layer coating board paper machine is designed. The concise control scheme and particular control algorithms employed are illustrated in detail, which mainly include pressure piecewise control for heat pump group and the low-point selection control for heat pump actuator, the pressure piecewise control for low-temperature dryer of wet paper sheet, the pressure split control for the secondary steam recovery of oven and the cascade control for paper sheet moisture. The application result indicates that the scheme proposed is feasible and effective.

关 键 词：纸机干燥部 蒸汽冷凝水系统 蒸汽喷射式热泵 控制方案 DCS 

分 类 号：P273[天文地球—测绘科学与技术]