硫酸盐结晶的MVR控制系统设计
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摘要
针对某企业的硫酸盐溶液蒸发结晶项目,介绍了MVR技术的应用及原理,并根据MVR技术原理,提出了将MVR技术应用于硫酸盐溶液蒸发结晶的工艺流程,同时对MVR技术的自动控制系统进行整体设计及硬件设计。控制系统通过PLC与变频器相结合的控制方式,对机械式蒸汽压缩机、进料泵、出料泵、强制循环泵等实现自动控制,同时可对硫酸盐溶液的浓缩、蒸发、结晶过程中的液位、温度及流量等工艺参数进行监测控制。
This paper introduces the application and principle of MVR technology in the project of evaporative crystallization of sulphate solution in an enterprise.According to the principle of MVR technology,the technological process of using MVR technology to vaporize and crystallize sulfate solution is proposed,and the overall design and hardware design of the automatic control system of MVR technology are carried out.The control system realizes the automatic control of mechanical steam compressor,feed pump,discharge pump and forced circulation pump by means of PLC combined with frequency converter.At the same time,the technological parameters such as concentration,evaporation,liquid level,temperature and flow in the crystallization process of sulfate solution can be monitored and controlled.
This paper introduces the application and principle of MVR technology in the project of evaporative crystallization of sulphate solution in an enterprise.According to the principle of MVR technology,the technological process of using MVR technology to vaporize and crystallize sulfate solution is proposed,and the overall design and hardware design of the automatic control system of MVR technology are carried out.The control system realizes the automatic control of mechanical steam compressor,feed pump,discharge pump and forced circulation pump by means of PLC combined with frequency converter.At the same time,the technological parameters such as concentration,evaporation,liquid level,temperature and flow in the crystallization process of sulfate solution can be monitored and controlled.
引文
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[2]唐华.MVR技术在硫酸铵蒸发结晶中的应用[J].广州化工,2015,43(24):179-180.
[3]竺东杰.基于材料提取的MVR浓缩工艺及其装备的研究[D].武汉:武汉工程大学,2014:6-8.
[4]柯超.基于材料浓缩MVR技术在线测控系统关键技术的研究[D].武汉:武汉工程大学,2015:19-22.
[5]李建海,张树团,刘陵顺.基于PLC和组态软件的温度控制系统设计[J].机电一体化,2009,15(11):65-73.
[6]黄菊生,胡争先.基于PLC和PC的温控系统设计与开发[J].自动化仪表,2005(4):48-51.
[7]李燕飞,张文志,王洪娟,等.基于PLC的智能温室控制系统[J].机械工程与自动化,2016(4):172-173.
[8]杨军,答嘉曦,余调琴,等.基于PLC和WinCC的温度控制系统设计[J].计算机与数字工程,2006(6):135-137.