文档介绍：PTA装置中压缩机组喘振控制的设计与实现
摘要:为确保压缩机在PTA装置中稳定可靠地运行,公司世界最先进的压缩机控制系统和世界三大安全系统之一的德国HIMA系统的结合设计来实现防喘振控制;通过分析PTA装置中压缩机组防喘振控制的特点,对其算法进行消化,针对机组防喘振系统正常负荷下,利于防喘振阀的实时准确地动作,提出了解决方案。实践证明,控制效果良好,使机组效率最大化。
关键词:PTA;压缩机;PID控制算法;防喘振技术
中图分类号:TH452 文献标志码:B
Design and Realization pressor Surge Control in PTA Installation
Abstract: For the purpose of assuring pressor can be operating reliably and stably in PTA installation, the most pressor control system in the world in C (compresor Controls Corporation) is adopted bined with German HIMA system design which is one of three biggest safety systems in the world to realize anti-surge control. Based on analyzing the characteristics pressor unit anti-surge control in PTA installation, the algorithm is understood in this paper. Aiming at the anti-surge valve can be operating in real-time and accurately, the solving project is pointed out under the normal load of unit anti-surge system. The practice proves that the control effect is good and makes the unit effiency maximum.
Key words: PTA; compressor; PID control algorithm; anti-surge technique
0 引言
0 the introduction
所谓PTA装置就是利用压缩机组向反应器提供大量的空气来作为氧气原料,使PX装置充分进行化学反应生成CTA产品,CTA进入下道工艺,与氢气进行充分燃烧最终生产成PTA产品,PTA化学全称为精对苯二甲酸,是合成纤维的主要原料。
A PTA plant is using pressor unit to the reactor to provide plenty of air for oxygen as raw material, make the PX device for chemical reaction to generate the CTA product fully, CTA into next process, fully in accordance with bustion final production in PTA product, called the PTA chemical purified terephthalic acid (PTA), is the main raw material of synthetic fiber.
该机组需要维持工艺波动情况下压缩机出口压力的稳定,从而保证氧化反应的顺利进行。特别是反应器突然降负荷时,采用压力超驰和防喘振协调控制来防止压缩机喘振和出口压力大幅波动。蒸汽轮机通过主蒸汽阀调整进入汽轮机的蒸汽量来保证功率平衡,维持转速的稳定。
Process fluctuations in case the unit need to maintain the stability pressor outlet pressure, so as to ensure the smooth progress of oxidation reaction. Especially when reactor load down suddenly, override and the surge coordination control is adopted to pressor surge and