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Process for advanced controlling rectifying apparatus of butadiene

An advanced control, butadiene technology for chemical engineering and systems engineering

Active Publication Date: 2005-11-09
SINOPEC YANGZI PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention mainly solves the quality closed-loop control problem of butadiene production equipment

Method used

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  • Process for advanced controlling rectifying apparatus of butadiene
  • Process for advanced controlling rectifying apparatus of butadiene
  • Process for advanced controlling rectifying apparatus of butadiene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Example 1: DA106 tower kettle water content advanced control system

[0104] see figure 1 , DA106 column is an azeotropic distillation column, mainly used to remove low-boiling impurities (methyl acetylene, saturated water) in crude butadiene. The column has 70 trays in total, and the 11th tray is the feed tray. There is about 1200mg / kg saturated water in the feed, after forming a low-boiling azeotrope with butadiene in the DA106 tower, it is distilled from the top of the tower, and after condensation, it is naturally divided into upper and lower layers by settling in the reflux tank. All the condensate in the upper layer is sent to the DA106 tower as the reflux of the tower; a very small amount of free water formed by sedimentation in the lower layer is discharged from the boundary area. The process flow is shown in figure 1 shown.

[0105] Table 1 shows the running results of the soft sensor model for 288 hours from 06:15 on July 1, 2003 to 06:15 on July 11, 2002...

Embodiment 2

[0110] Example 2: Advanced Control System for Tail Gas Discharge at the Top of DA106 Tower

[0111] In the design of the industrial soft-sensing model, the above-mentioned soft-sensing modeling technology is still used to establish the industrial soft-sensing model of the MA content at the top of the tower. Figure 5 It shows the real-time operation effect of the MA concentration soft measuring instrument in the tail gas of the DA106 rectification tower during the real-time operation period from December 1, 2002 to December 09, 2002. The soft measurement model is simple and practical, and the online correction function is reliable and effective. The design of the control scheme is advanced, practical and reliable, achieving the effect of significantly reducing energy consumption, increasing product yield and ensuring safe operation.

[0112] The key to the design of this advanced control scheme is to calculate an optimal tower top tail gas discharge, because if the discharg...

Embodiment 3

[0114] Example 3: DA107 tower return flow advanced control subsystem

[0115] Based on the variable analysis of the process operation of the plant and the simulation study of the mathematical model of the process mechanism of the DA107 distillation column, a soft sensor model for the content of butadiene and total alkyne in the top product of the DA107 column was established. The product quality soft sensor model developed in this project has high precision, which lays the foundation for the next step to realize the closed-loop advanced control of product quality. Figure 8 It shows the real-time operation effect of the DA107 tower top product quality butadiene-1,3 concentration soft measuring instrument during the real-time operation of the DA107 rectification tower from 16:15 on September 20, 2002 to 16:15 on October 1, 2002 . Table 2 shows the comparison results between the online estimated value and the test value of the actual operation of the product quality soft inst...

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Abstract

An advanced control method for the butadiene rectifying apparatus consisting of the first and the second rectifying towers include such steps as measuring the real-time data of the first rectifying tower, filtering, running the soft measuring model, inputting the filtered data to it to obtain the water contant of its tower still and the methyl ethyne content of its tower top, and in-line closed-loop optimizing control on the basis of DCS.

Description

1. Technical field [0001] The invention relates to a control method in the fields of chemical engineering and system engineering, in particular to an advanced control system for a rectification device in butadiene production. 2. Background technology [0002] In recent years, advanced process control technology has been successfully applied in a large number of industries, especially with the continuous development of computer application technology, automatic control technology and artificial intelligence technology, advanced process control technology plays an increasingly important role in the safe and efficient operation of petrochemical equipment. Enterprises are no longer satisfied with simply obtaining economic benefits from the process design of the production process and the transformation of production equipment, but comprehensively apply chemical engineering technology, computer application technology and automatic control technology. Advanced computer control and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/04
Inventor 张湜蒋勇林锦国蒋思康戴庆成张金旭蔡宁哈兵薄翠梅葛远富崔军勇
Owner SINOPEC YANGZI PETROCHEM
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