Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Calculation method for time lag tolerance index of chemical reactor system

A reactor system and calculation method technology, applied in calculation, computer-aided design, instrument and other directions, can solve problems such as deterioration of operating conditions and reduction of heat transfer coefficient, and achieve the effect of improving safety and reliability

Active Publication Date: 2017-03-22
DONGGUAN UNIV OF TECH
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the reduction of heat transfer coefficient caused by fouling may not be dealt with or controlled in time within a certain operation cycle, and as the operation time prolongs, the operating conditions will further deteriorate due to the influence of uncertain parameters

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Calculation method for time lag tolerance index of chemical reactor system
  • Calculation method for time lag tolerance index of chemical reactor system
  • Calculation method for time lag tolerance index of chemical reactor system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Assuming that the critical point of uncertain parameter change that limits the flexibility of the system can be determined or known, by introducing the delay tolerance index variable , referring to the flexibility index problem (DFI), the following expression model of the chemical system delay tolerance problem (DTI) is obtained:

[0021]

[0022] in, d is a design vector related to the size of the operating unit, which remains unchanged during the operation; x To describe the state variables of the process system; z is a vector set of control variables that can be adjusted; θ for uncertain parameters and T is the change interval of the uncertain parameter; h and g are process equality constraints and inequality constraints, respectively; superscripts U and L represent uncertain parameters θ and control variable z upper and lower limits; t is the time variable, τ Indicates the lag time variable of the system; in the above formula, if x (d) ≤ ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a calculation method for the time lag tolerance index of a chemical reactor system. The calculation method comprises the following steps of: firstly, carrying out modeling on the reactor system, and adopting a Taylor expansion and Laplace transform to linearize the reactor system into a transfer function model which contains an uncertain parameter and a time lag value; then, adopting a control strategy of PID (Proportion Integration Differentiation) closed-loop control to carry out a dynamic response performance test on the system, wherein a PID parameter is optimized through the NCD (Nonlinear Control Design Package) module of MATLAB; and finally, combining a bisection method with the dynamic response performance test result of the system to solve a maximum time lag value [Tao]max which can be tolerated by the system. By use of the method, the maximum time lag value which can be tolerated by the reactor system under a certain control strategy can be quickly, simply and effectively determined so as to improve the safety and the reliability of the practical operation of the chemical reactor system which contains the uncertain parameter.

Description

technical field [0001] The invention relates to a calculation method of a time-lag tolerance index of a chemical reactor system, in particular to a calculation method of a time-lag tolerance index of a chemical reactor system with an uncertain heat transfer coefficient. Background technique [0002] In the operation process of some actual chemical systems, the uncertain parameters cannot be adjusted in actual working conditions. For example, the reduction of heat transfer coefficient caused by fouling may not be dealt with or controlled in time within a certain operating cycle, and as the operating time prolongs, the operating conditions will further deteriorate due to the influence of uncertain parameters. In this case, in order to ensure the safety and reliability of the actual operation of the chemical system, it is very necessary to solve and analyze the maximum time delay that the system can tolerate, so that in the actual operation process, the transmission distance ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/12
Inventor 黄卫清谭桂平程志毓柳鹏
Owner DONGGUAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com