Research And Improvement Of The Control System Of The Beverage Intermix Plant

The beverage intermix plant is the most important part in the whole production line. Its performance directly affects the component and taste of the beverage. The key of the beverage intermix plant is its process procedure and the control principal. This thesis aims at developing a new beverage intermix plant based on the working principal of the 0+H intermix plant and SEN intermix plant. The main contribution of the thesis is as follows:At first, the water flow, general control system as well as the pressure and electric control system of 0+H intermix plant and SEN intermix plant are analyzed. It is summarized that intermix effect and control precision of 0+H intermix plant is better than of SEN intermix plant, and SEN intermix plant is more simple and cheaper than 0+H intermix plant. The control object, carbon dioxide of solubility and dosing proportion, of the intermix plant is studied. Calculation formulae of correlative variable is summarized by determining the variational rule of the control object, then the curve is drawn by programming.Secondly, a revised mode is given, and the design scheme is established by optimization design. A new control approach to separate two control variable, e. g. pressure and temperature of the intermix plant, is put forward. The disturb which is arose by temperature warp is eliminated by-revise feedback and for disturb revise. The principal of the general control system of intermix plant has become simpler and more precision for separated the temperature and pressure control system. The temperature, pressure and electric control system of new beverage intermix plant is designed based on this new approach.Thirdly, the control strategy of classification and subsection is brought forward by analyzed the characteristic of every component of the temperature control system. The temperature control system is realized byroughness adjusted of the heat exchangers and minute adjusted of the temperature control valve, and on the basis of it, the pressure and electric control system is realized.Finally, mechanical design is carried out, and the fixing sketch map, drawing of foundation, water pipeline system, CIP cleaning system and intermix pipe is designed by AutoCAD.