An integrated optimization method for process design and control of continuous stirred tank reaction process
A technology of reaction process and process design, applied in program control, comprehensive factory control, electrical program control, etc., can solve complex problems, achieve good economic performance and dynamic performance, and reduce computational complexity.
Active Publication Date: 2018-01-16
ZHEJIANG UNIV OF TECH
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Problems solved by technology
[0004] The present invention overcomes the above-mentioned problems existing in the prior art, and provides a continuous stirred tank reaction process process design and control integration optimization method, which can effectively solve complex problems during process design and control integration optimization, and greatly reduces computational complexity characteristics, and at the same time make the design process have good economic performance and dynamic performance at the same time
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[0115] Such as image 3 Shown is a CSTR process. Assuming that a first-order irreversible exothermic reaction A→B occurs in the CSTR, the reaction temperature and the outlet concentration of the reactant are regulated by the jacket cooling water flow. According to the material balance and energy balance, there are the following strongly nonlinear state equations:
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[0119] A H = πD R h (25)
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[0121] Among them, C A,0 is the inlet concentration of the reactant, C A is the outlet concentration of the reactant, F is the feed flow rate, K 0 Pre-exponential factor, E is the activation energy of the reaction, R is the ideal gas constant, T is the temperature of the reaction mixture in the reactor, T J is the temperature of jacket cooling water, T 0 is the feed temperature, T J,0 is the cooling water inlet temperature, ΔH is the heat of reaction, U is the heat transfer coefficient, A H is the heat transfer area, C P 、C J Resp...
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An integrated optimization method of design and control of a continuous agitated vessel reaction process technology provided by the invention comprises the following steps: the step 1, establishing a strict mechanism model aiming at the continuous agitated vessel reaction process technology on the basis of the mass balance and energy balance principle; the step 2, obtaining a linear state space model of an object in a random frame; the step 3, calculating an optimal performance boundary of the closed-loop variance of manipulated variables (MVs) and controlled variables (CVs) and an MVs / CVs variance based on the linearity quadratic gauss (LQG) control principle, and according to the LQG coordination curve, the function relation between MVs variable variance variation and the CVs variable variance variation of the system is determined; the step 4, combining the back-off strategy and process stable state model and the operation conditions and technical indexes of the process to be process constraints for setting the constraint probability permitting violation, establishing the technology design and the control of integrated optimization, and solving and obtaining optimal technology design parameters according to the optimization algorithm.
Description
technical field [0001] The invention relates to the field of industrial control, in particular to an integrated optimization method for process design and control of a continuous stirred tank reaction process. Background technique [0002] In the chemical system, the reactor is the most influential unit device in the whole process, which often determines the nature of the entire process, as well as the economics of production and the impact on the environment. The Continuous Stirred Tank Reactor (CSTR) is a reactor widely used in the chemical industry, and it is also a typical dynamic system in the process industry with serious nonlinearity. [0003] Traditional chemical process process design and process control are carried out in accordance with the step-by-step sequential design method. That is, first determine the process design that meets the requirements based on the process steady-state model and economic optimal criteria; then design the control system on this basis...
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IPC IPC(8): G05B19/418
CPCG05B19/41885
Inventor 周猛飞蔡亦军潘海天
Owner ZHEJIANG UNIV OF TECH