Chemical cent has the following characteristic from equipment technology:

(1) chemical industry divides the diversity that leaves a technology

Because change workpoint to leave applied domain of the technology very extensive, decided the diversity of detached technology. Differentiate by mechanism, can divide 5 kinds roughly: ① generates new look to depart in order to undertake (like) of distillation, crystallization; ② joins new look to undertake depart (like extraction, absorb) ; ③ undertakes depart with partition (like membrane separation) ; ④ undertakes depart with solid reagent (like) of adsorptive, ion exchange; ⑤ undertakes depart with outside force field and gradient (if centrifugal extraction is detached,wait for) with electrophoresis, their characteristic and design method differ somewhat.

Keller summed up a few commonly used and detached technologies and plan of applied maturity concern 1987. Rectification, extractive, absorb, crystallization still is the detached technology with current most application. Although conception is clever,lilquid film departs, but there still is limitation on the technology, be in only medicaments delay commentate waited for a respect to get applied.

(2) chemical industry divides the complexity that leaves a technology

Chemical industry divides the complexity that decided it from technical importance and diversity. Although to rectification, extraction these relatively mature technologies, the design that much group fission is large facility still is a difficult job, the problem is data of devoid foundation character and large tower implement reliable design method. To system of high temperature, high pressure, much constituent and strong blame ideal, balance data and molecular diffusion coefficient not only hard accurate computation, wait for even interfacial tension viscosity content sex data to also be gotten hard.

Data lacks the fundamental character of the coupling depart technology of activator and reaction extraction and so on more. Large tower implement the main difficulty of the enlarge of the design is flowing at the two-phase inside the tower and send simple character very complex, digital model still is not perfected. Continue to use although balance level model of more than 100 years is simple intuitionistic, but the weakness that is used at process of much constituent depart already clearly. Blame balance model is called " may initiate design of equipment of board type depart and imitate epochal " advantage is distinct, but lack passes data of qualitative coefficient test and model parameter overmuch, make its project applies existence difficulty. The software function that already developed is powerful, already got applied in engineering design, but engineering experience and in trying an experiment still is indispensable.
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