关键词:

化工装置, 化学反应, 火用传递, 火用传递模型

Abstract:

To describe the chemical reaction system (CRS), enthalpy analysis expresses merely the quantitative energy utilization, exergy analysis is only the static description of energy activities, while the exergy transfer approach can perform the dynamic description for CRS.Some reaction system characteristics were analysed and obtained by using exergy transfer theory.The transform unit of chemical exergy acts as a leading role in the whole CRS, the reaction exergy resource with a high temperature is a common exergy resource for all exergy transport units, which belong to the parallel connection frame of radiation type.In view of the above, the exergy transfer model which clearly displays the formation characteristics and basic features of general exergy transfer model of CRS was established.It is a series-parallel connection composite model, consisting of a chemical exergy transform unit with exergy transport units group.Based on the chemical equilibrium and exergy balance equations and exergy transfer theory, the exergy transfer equation was established.It reveals the properties of exergy fluid rates for reactants, reaction products, impurities,etc., and the quantitative connection that these parameters transform into and transfer with each other.Accordingly, the quantitative and qualitative description of exergy transfer mechanism may be obtained.Proceeding to the next step, the exergy transfer analysis and calculation for CRS could be made.

Key words:

化工装置, 化学反应, 火用传递, 火用传递模型