Interaction in two-variable control systems for distillation columns—II

Rijnsdorp, J.E.

doi:10.1016/0005-1098(65)90019-1

Cited by 23 publications

(12 citation statements)

References 1 publication

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“…The simulation uses simple PID controllers and the controller settings are given in Table 2. Another approach to the dual quality control of a distillation column is to use the control scheme suggested by Rijnsdorp 5, 6 and later by Rijnsdorp and Van Kampen 7. This scheme, which can be easily implemented with Mathematica®, utilizes a ratio controller to control the ratio of the overhead vapor rate to reflux flow rate.…”

Section: Control Of a Binary Distillation Columnmentioning

confidence: 99%

Study of the separation of simple binary and ternary mixtures of aromatic compounds

Binous

Al-Mutairi

Faqir

2011

Comp Applic In Engineering

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Consider binary and ternary mixtures of aromatic compounds composed of benzene/toluene and benzene/toluene/p-xylene, respectively. The present study shows how one can apply both mass and energy balance equations in order to understand the separation of such ideal mixtures by distillation. An adiabatic flash distillation problem is solved graphically for a mixture composed of benzene/toluene. Rigorous resolution of a steady-state binary distillation problem, using Mathematica 1 and the same benzene/toluene mixture, shows perfect agreement with results obtained using HYSYS. Results of a dynamic simulation involving the solution of a relatively large system of differential algebraic equations are presented and discussed for the benzene/toluene mixture. SIMULINKß and Mathematica 1 are used to perform control of this binary distillation column. Finally, a steady-state simulation of a simple multicomponent mixture, composed of benzene/ toluene/p-xylene, is studied and some qualitative results are drawn from both the temperature and composition profiles. ß

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Section: Control Of a Binary Distillation Columnmentioning

confidence: 99%

Study of the separation of simple binary and ternary mixtures of aromatic compounds

Binous

Al-Mutairi

Faqir

2011

Comp Applic In Engineering

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“…0 An increase in boilup V may in some cases initially push liquid off the trays and result in a temporary increase in liquid flow in the column (A s 0.5 in Table 1). The effect is a possible inverse response for Vs effect on M, and xB (the K2 effect; Rijnsdorp, 1965). 0 Large overshoots in the open-loop response are often encountered with the material balance configurations (using D or B).…”

Section: Dynamic Considerationsmentioning

confidence: 99%

Control configuration selection for distillation columns

1987

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Most two-product distillation columns can be described as 5 x 5 plants, but the control system design is usually simplified by means of the following procedure:1. Choose two manipulated inputs for composition control (corresponding to a specific control configuration).2. Design the level and pressure control system (usually three SlSO controllers).3. Design a 2 x 2 controller for composition control. This paper provides guidelines for step 1, which is considered the most important. Ratios (e.g., L I D or V I B ) are frequently chosen as manipulated inputs in step 1. It is shown that the ratio configurations are effectively complex multivariable controllers that provide, among other features, improved flow disturbance rejection.

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“…However, a huge part of them presents rather academic examples without testing the results of the analysis in a validated simulation model of a real plant. Furthermore, DRGA is rarely considered in practical applications [25], [6]. As DRGA provides suitable pairings for different frequency domains of the plant model, it remains unanswered in the literature, which effects influence the operation frequency domains of a real plant.…”

Section: Introductionmentioning

confidence: 99%

Relative Gain Array and Singular Value Analysis to Improve the Control in a Biomass Pyrolysis Process

Hofmann¹,

Holz²,

Gröll³

2019

2019 IEEE 15th International Conference on Control and Automation (ICCA)

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The pairing of actuators and controlled variables for process control is non-trivial due to couplings among process quantities and further disturbing effects. Here, we consider the product gas stage in a biomass pyrolysis process. Based on a dynamic model of the latter, several analyses, namely Relative Gain Array (RGA), Dynamic Relative Gain Array (DRGA) and Singular Value Analysis (SVA) are performed to solve the pairing problem. In particular, we emphasize the practical benefit from DRGA's results by showing that challenges, like non-measurable disturbances or time delays, can be mitigated by simple changes in an implemented control concept.

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Interaction in two-variable control systems for distillation columns—II

Cited by 23 publications

References 1 publication

Study of the separation of simple binary and ternary mixtures of aromatic compounds

Study of the separation of simple binary and ternary mixtures of aromatic compounds

Control configuration selection for distillation columns

Relative Gain Array and Singular Value Analysis to Improve the Control in a Biomass Pyrolysis Process

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