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Intelligent control method for automatic load increasing and reducing of methanol rectification device

A technology of intelligent control and methanol rectification, applied in the direction of distillation adjustment/control, chemical instruments and methods, fractionation, etc., can solve problems such as system fluctuations and energy waste, and achieve the effect of overcoming system fluctuations and energy waste

Pending Publication Date: 2022-01-04
四川泸天化创新研究院有限公司 +1
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  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the problems of system fluctuation and energy waste caused by the hysteresis or over-regulation of the feedback-based control method of the operator and the DCS system itself, and at the same time realizes unmanned intelligent operation. The key temperature control points of the system always maintain stable operation

Method used

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  • Intelligent control method for automatic load increasing and reducing of methanol rectification device
  • Intelligent control method for automatic load increasing and reducing of methanol rectification device

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no. 1 approach

[0019] The first embodiment of the present invention is an intelligent control method for automatic loading and unloading of a methanol rectification device, comprising the following steps:

[0020] The real-time temperature of each temperature point in the pre-distillation tower, pressurization tower, atmospheric tower and recovery tower is obtained through the DCS system of the intelligent control system;

[0021] The above real-time temperature is corrected by the pressure correction temperature soft sensor to obtain the corrected temperature;

[0022] Set the above-mentioned correction temperature and the first parameter of the pre-distillation tower, the pressurization tower, the atmospheric tower and the recovery tower on the operation interface; and

[0023] The intelligent control system sets the second parameters of the pre-distillation tower, pressurization tower, atmospheric tower and recovery tower according to the set correction temperature, and realizes the contr...

Embodiment 1

[0033] An intelligent control method for automatic loading and unloading of a methanol rectification device, the specific steps are as follows:

[0034] Step 1: The intelligent control system reads the temperature of each temperature point in the pre-distillation tower, pressurization tower, atmospheric tower and recovery tower through the DCS system, and the pressure is corrected by the pressure correction temperature soft sensor of the intelligent control system The temperature is displayed on the intelligent control system operation interface.

[0035] Step 2: Set the crude methanol feed to the pre-distillation tower (gradient change), and at the same time set the temperature of the pre-distillation tower, pressurization tower, atmospheric tower and recovery tower on the operation interface of the intelligent control system (the temperature is the temperature calculated by the soft instrument after pressure correction), as shown in Table 1.

[0036] Table 1

[0037]

...

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Abstract

The invention belongs to the technical field of chemical engineering, and discloses an intelligent control method for automatic load increasing and reducing of a methanol rectification device. The method comprises the steps of acquiring real-time temperature of each temperature point in a pre-rectifying tower, a pressurizing tower, an atmospheric tower and a recovery tower through a DCS of an intelligent control system; correcting the real-time temperature through a pressure correction temperature soft measuring instrument to obtain a corrected temperature; setting the correction temperatures and first parameters of the pre-rectifying tower, the pressurizing tower, the atmospheric tower and the recovery tower on an operation interface; and enabling the intelligent control system to set second parameters of the pre-rectifying tower, the pressurizing tower, the atmospheric tower and the recovery tower according to the set correction temperature, and controlling the second parameters through the DCS. The problems of system fluctuation and energy waste caused by lag or excessive adjustment of a feedback-based control mode of an operator and the DCS are solved, meanwhile, unmanned intelligent operation is realized, and each key temperature control point of the system always keeps stable operation in the load increasing and decreasing process of the methanol rectification device.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to an intelligent control method for automatic loading and unloading of a methanol rectification device. Background technique [0002] The methanol four-tower rectification process mainly includes a pre-rectification tower, a pressurization tower, an atmospheric tower and a recovery tower. The rectification process is a complex control process with multiple variables and strong coupling. In actual operation, it is affected by various factors. The load adjustment of the production unit is manually operated by the operator. Usually, there will be over-adjustment or untimely adjustment. From the fluctuation of system parameters, etc., the production cost of the methanol rectification unit will be increased in disguise. Contents of the invention [0003] In order to solve the problems in the background technology, the present invention provides an intelligent control method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/42B01D3/14C07C29/80C07C31/04
CPCB01D3/42B01D3/14C07C29/80C07C31/04
Inventor 蒋弟勇黄涛黄见东张小娟傅利才王绍贵辜凯德汪国瑜刘鑑涂洪斌刘富祥
Owner 四川泸天化创新研究院有限公司
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