基于PLC控制的电加热器在空分纯化系统中的应用

Application of PLC Control Based Electric Heater in Air Separation Purification System

针对某公司空分纯化系统电加热器加热效率低下、控制回路功能不完善等问题,提出电加热器PLC控制方案,将全调功加热调整为部分固定加热和部分调功加热,利用PLC设计控制系统,实现电加热器的本地控制及远程自动控制。实际应用表明,PLC控制方案具有良好的实用性及经济性,每年至少可节约成本59.4万元。

Aiming at the low heating efficiency of electric heater in air separation purification system of a company and the imperfect function of control loop,we put forward the PLC control scheme of electric heater,adjusting the fully power-regulated heating to partially fixed heating and partially power-regulated heating,and designing the control system by PLC to achieve the local control and remote automatic control of electric heater.Practical application shows that the PLC control scheme has good practicability and economy,and it can save at least 594,000 RMB per year.