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A control method for a catalytic cracking unit

A technology of catalytic cracking unit and control method, which is applied in the control field of catalytic cracking unit, can solve problems such as reducing catalyst activity, and achieve the effects of improving production efficiency, stable operation, and safe operation

Inactive Publication Date: 2020-06-02
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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Problems solved by technology

Coke, a by-product of the cracking reaction, is attached to the surface of the catalyst, reducing the activity of the catalyst

Method used

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  • A control method for a catalytic cracking unit
  • A control method for a catalytic cracking unit
  • A control method for a catalytic cracking unit

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Embodiment Construction

[0030] A control method for a catalytic cracking unit of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Such as figure 1 Shown, a kind of control method of catalytic cracking unit, comprises steps:

[0032] S1. Determine the controlled variable in the catalytic cracking unit, the controlled variable is the temperature of the cyclone separator and the coke content of the regenerator;

[0033] S2. Based on the parameterized mathematical model of the catalytic cracking unit, obtain the optimal setting value corresponding to the temperature of the cyclone separator and the coke content of the regenerator;

[0034] S3. Obtain the data set of input variables and output variables, establish a prediction model for the coke content of the regenerator, and perform online prediction of the coke content of the regenerator;

[0035] S4. Using the feedback controller to perform online closed-loop con...

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Abstract

The invention provides a control method of a catalytic cracking device. The method comprises the following steps of determining controlled variables in the catalytic cracking device, wherein the controlled variables are the temperature of a cyclone separator and the coke content of a regenerator; obtaining the optimum setting value corresponding to the temperature of the cyclone separator and thecoke content of the regenerator on the basis of a parameter mathematical model of the catalytic cracking device; obtaining a data set of the input variable and the output variable; building a prediction model of the coke content of the regenerator; performing online prediction on the coke content of the regenerator; performing online closed loop control on the output of a software measuring modelof the temperature of the cyclone separator and the coke content of the regenerator by using a feedback controller. The whole method has the advantages that the operation is safe; the operation is stable; the economic index is directly optimized to a great degree; the production benefits are effectively improved.

Description

technical field [0001] The invention relates to the field of catalytic cracking, in particular to a method for controlling a catalytic cracking unit. Background technique [0002] Catalytic cracking unit is one of the core processes of petroleum refining and chemical industry, and it is also one of the most technically difficult processes. How to use the automatic control theory and optimization technology to operate the catalytic cracking unit smoothly and efficiently is an important proposition of the automation technology of the refining and chemical industry. In the catalytic cracking unit, the oil feed and the catalyst recovered from the regenerator are first mixed and preheated, and enter the riser for cracking reaction. The high temperature regenerated catalyst provides the heat required for the gasification and reaction of heavy oil. The stripping section of the separator is fed with stripping steam to separate the volatile gas-phase hydrocarbon products from the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/00
CPCC10G11/00
Inventor 叶凌箭沈非凡王朗李英道马修水
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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