连续搅拌槽式反应器(CSTR)——定态非绝热操作的热稳定性

本文研究了连续搅拌槽式反应器(CSTR)定态非绝热操作,即反应器具有通过器壁的热损失时的临界条件及其有关问题;讨论了如何在分析这类非绝热放热反应器操作条件中热灵敏区间时,采用适当的无量纲参数.使问题的描述具有和相对简单的绝热反应器—致的形式;导出了非绝热系统点火(飞温)和熄火这两个热灵敏边界的数学表达:还证明了当满足xS/v≥QC_0E/RT~2_(ref)(1/4-RT_(ref)/E)-1时,可以避免出现热灵敏区间.由于上式左边的量易于在工程上进行控制,上式在化学工程设计和控制中具有现实意义.

Thermal Stability of the Continuous-flow StirredTank Reactor (CSTR) under Stationary State and Non-adiabatic Operation

This paper studies the condition for criticality and some related problems for the stationary-state of the continuous-flow stirred tank reactor(CSTR) under non-adiabatic operation with heat loss through its wall. Dimension-Jess parameters may be used in analysing the thermally sensitive region in order to reduce the problem to the same form as that for the simpler adi-abatic CSTR. Mathematical expressions for the two important thermally sensitive boundaries of ignition and extinction are derived. And it is also shown that when the thermally sensitive regions disappear. Because the left-hand side of the above relation contains parameters that are easily controlled, this relation possesses practical importance in chemical engineering design and control.