Npk Fertilizer And Intelligent Process Control System

Chemical industry plays a very important role in our country. It can not be replaced in every walk of life for the chemical products. At the present time, the extent of automation of Chemical industry is still in a elementary stage in our country and the level of automation, compared with other developed countries, is very lower. In the control process, a lot of technological parameters are tuned manually. It is not only time-consuming but also not meets the need of the technology and the control accuracy.The compound fertilizer product line is very complex system. It is concerned in the parameters of temperature, pressure, concentration, flux rate and so on. The product quality depends on, to a large extent, the control over the technological parameters, such as temperature, pressure, and flux rate. So it is necessary to provide a online-control means to ensure the temperature, pressure flux rate and the component steady in order to improve greatly the product quality ,yield and energy saving. The production rate and enterprise benefit are also improved because of the use of the control means.The design aim of the control system is to realize automatic control over the key technological equipment, to amend the common control quality of the production process, to improve the control accuracy and realize safe production; to amend the acquisition of the technological parameters so as to control and monitor concentratively. Ii is also to quantize the technological aim and to standardize technological operation to arrive at the sequential and complete control of the whole product line , the reduction of the working man and to realize the automatic level of 'one-line by one-man' in the end.This article describes a control system of SIEMENS PCS7, used on the compound fertilizer product line (200000tons/year) in Shandong Lvyuan Group. The system contains automatic control technique, computer information...