Based On Negative Pressure Low Temperature Evaporation Technology Low Energy Consumption Evaporator's Research

This topic will blow the membrane evaporation craft introduction distilled water in the production, the research design blows the control system which the membrane evaporates, this regarding enhances the distilled water production the energy conservation to fall consumes saves the cost and the enhancement automation level has the significant significance. this article first introduced the paper project background as well as blows the membrane evaporator's domestic and foreign development present situation. Blows the membrane evaporator widely to apply in the industrial production. Regarding blows the membrane evaporator's application. First,understands its structure and the evaporation principle. Regarding blows the membrane evaporator's main body and the supporting facility carries on the detailed explanation. In the existing test installation's foundation, designates the work flow, through the experimental study, analysis different parameter variable's and so on under the feeding temperature, heat conduction oil temperature, rotor speed and system vacuum degree transpiration rate's change rules, the discussion different operating parameter to blows the membrane evaporator heat transfer evaporation performance the influence. Determined finally the major effect factor, carries on the control in the following production process. Have carried on the detailed elaboration to the evaporator principle of work as well as the related supporting facility.Blows the membrane evaporator, belongs to the single-effect evaporation. Carries on the quality graduated arm to its solute to calculate that calculated with the thermal graduated arm, to blow the membrane evaporator mechanism analysis to provide the rationale. With the mechanism modelling's method, the constraints is in input certain situation, produces more steam, causes the production process always to consume energy few, has established the heat conduction oil initial temperature and evaporator's vacuum degree model. in heat conduction oil electric stove's controlled process, because is accused the parameter to have time-variable, the misalignment, indefinite and so on factors, the conventional PID control algorithm satisfies the control request with difficulty. In the article uses the fuzzy PID algorithm, the determination subordination function and the fuzzy control rule. Uses fuzzy reasoning online installation PID controller's 3 parameter KP, KI, KD. Regarding the different response's process, chooses the different PID controlled variable, thus causes the controlled variable choice to be more reasonable, enables the process each performance index to achieve the optimum condition.The off-line calculated the questionnaire under the MATLAB environment, used in the Simens software to realize the procedure design using the table look-up law, this in blew the membrane evaporator distilled water for the fuzzy control in the production to lay the foundation. Next, studied and designs has blown the membrane to evaporate complete set of equipment's control system, has determined production equipment's choice. This control system is controls machine, PLC and the touchscreen collection and distribution control system based on the labor, it by PLC, the sensor and the execution unit has composed the lower position machine control system together; Control by the touchscreen and the labor machine carry on the configuration as the superior machine the control system. In view of control system's content and the request, have given the control method and the mutual communication way. Realizes fuzzy PID as well as the conventional PID algorithm using PLC carries on the simulation quantity closed-loop control. For better realizes the man-machine interaction, application configuration software Wince flexible completes the superior machine touchscreen and the PLC monitoring configuration, has realized the production process flow monitoring, the temperature and the pressure and so on functions and so on control, real-time warning as well as historical data inquiry. The control room labor controls machine and the scene PLC monitoring configuration software is Wince.