Studies On Intelligent Computer-Aided Design For Mixing Equipments

Agitated vessels are widely used in various industries. But in the design of agitated vessels, many problems could not be analyzed, modeled and solved by conventional mathematical methods. It has greatly limited the application of computer in the design of agitated vessel, which is mostly depended on the experience of experts. Therefore, the automatic design of agitator vessel is unsolved. There is a new way to break the bar by using expert system technology to solve this problem.Intelligence Computer-Aid Design of mixing equipments system (MIXiCAD) is developed by Zhejiang University includes bellow: selection of agitated vessel, chemical engineering design, detailed machine design, economy analysis and machine painting etc. This thesis precedes the enlargement of the function to the prototype system and perfect with the structure in system partly. In a specific way the main result that obtain is as follows:1. While designing agitated vessels, the heat transfer problem should be considered seriously for insureing the reaction heat could be removed away to maintain suitable temperature in the reactor to ensure the product is good. This thesis studied the heat transfer process of agitated vessels systemically and analysis the calculation method of heat transfer in agitated vessels. Two Nu knowledge bases are estimated correspond to the feed in vessel and cool-water in the jacket and coil for calculation of heat transfer coefficient. Realize the automatic calculation of the heat transfer of Agitated vessels.2. Metzner constant is the basic data that apply to the evaluation of Mixing Power of non-Newtonian fluid. A database of Metzner constant is built up which can be applied to different Re constant and different impellers conditions by analysis the extensive collected data. Realize the automatic calculation of Metzner constant.3. Suspension polymerization is the main way in industrial production of PVC. The design of it has those characters: huge volume, high demand of heat transfer,magnify complexly and etc. A professional module of PVC vessel design is. built up by analysis the extensive collected data. Realize the computer-aid design of PVC vessel. The result is optimum for minimum power consumption.4. Emulsion has those characters: low viscosity, heat transfer and mixing easily, controllable etc. magnify emulsion vessel is complexly. A professional module of Emulsion vessel design is built up by analysis the extensive collected data. Realize the computer-aid design of emulsion vessel. The result is optimum for minimum power consumption.5. Hand over to interface of the prototype system; making system can communicate with customer more friendly. By adjusting the construction of the relevant module made new module and database integrative with original system as a whole.The new function module could be added by "building blocks" design method . in order to perfect the software easily.The prototype system was expanded largely on the base of abundant collected data and knowledge in this thesis. The configuration of system is perfected, new module is added, the ability of system is enhanced, and interface is changed more friendly. It is a stable base for prefect and expand in the future.