Rectification tower automatic control and optimization method

An optimization method and technology of rectification tower, applied in the direction of distillation adjustment/control, etc., can solve problems such as unfavorable soft sensor control scheme, unstable operation, oscillation, etc.

Inactive Publication Date: 2006-04-26
TSINGHUA UNIV
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Problems solved by technology

This is also not conducive to control schemes based on product quality soft-sensing
[0007] According to the analysis of the operation process of the actual distillation column and the simulation research based on the process simulation software, it is found that when the operating conditions of the distillation col

Method used

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  • Rectification tower automatic control and optimization method
  • Rectification tower automatic control and optimization method
  • Rectification tower automatic control and optimization method

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Embodiment Construction

[0088] Establishment of Optimal Agent Model (Neural Network Model)

[0089] Process simulation software or other mechanism analysis models simulate various chemical process units through mechanism modeling. Through parameter adjustment, sufficient accuracy can be achieved to guide production. Due to the use of the mechanism method, the accuracy of the simulation of the actual unit process can be guaranteed in a wide range. However, due to the complexity of the mechanism calculation, the amount of calculation is relatively large, it is difficult to use online, and the software is expensive.

[0090] This shortcoming can be overcome by using process simulation software or other mechanism analysis models to provide input and output data reflecting large-scale changes in the production process, performing statistical model training, and obtaining a simple proxy model that can be used online. At the same time, using process simulation software or other mechanism analysis model dat...

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Abstract

The invention relates to a method for controlling and optimizing the distillation tower. It controls the distillation tower in dependence on the material balance relation and component balance relation, optimizes the distillation tower by using representative model. Employing the abstraction proportion between the light product on the top of the tower and heavy product in the bottom of the tower (in following, taking the proportion between light and heavy product for abbreviation) as main controlled variable depending on the distillation principle, the material balance and component balance in the distillation tower, controlling the proportion between the light and heavy product, temperature, reflux ratio to realize stable operation by regulating the quantity of reflux and heat load of re-boiler. Simulating the practical course through the technological process simulation software, and training the nerve net model to become the representative model for the course optimization. Optimizing the operation with the representative model by using the analytical data for the raw material and product to realize the product Ka bian optimization, increasing the productivity of product with high value on the condition of guaranteeing the product quality and realizing the device energy saving and consumption reduction.

Description

technical field [0001] The invention relates to an automatic control and optimization method of a rectification tower, and belongs to the field of automatic control of a chemical rectification tower and production process. Background technique [0002] In the process of petroleum refining and chemical industry, almost every device involves the liquid-liquid separation process, and the rectification tower is the main process unit to realize the liquid-liquid separation of miscible substances. [0003] Distillation towers can be divided into two types according to the number of products and separation precision: one is called fractionation tower, and its purpose is to divide the raw materials such as petroleum with very complicated composition into multiple products according to the distillation range. There are multiple product side lines outside the bottom, such as the atmospheric distillation tower of the atmospheric and vacuum unit, the main fractionation tower of the cata...

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Application Information

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IPC IPC(8): B01D3/42
Inventor 黄德先吕文祥王宇红金以慧
Owner TSINGHUA UNIV
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