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Hybrid modeling method for rotary cement kiln burning zone temperature based on LS_SVM soft measurement

A cement rotary kiln and firing zone technology, applied in character and pattern recognition, special data processing applications, instruments, etc., can solve the problem of inaccurate measurement of firing zone temperature, achieve real-time correction and avoid poor accuracy , the effect of good guidance

Inactive Publication Date: 2015-07-22
UNIV OF JINAN +1
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AI Technical Summary

Problems solved by technology

Since the temperature of the firing zone is extremely high inside the rotary kiln, there is currently no instrument to accurately measure the temperature of the firing zone, and the temperature of the firing zone is one of the important factors affecting the quality of clinker firing

Method used

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  • Hybrid modeling method for rotary cement kiln burning zone temperature based on LS_SVM soft measurement
  • Hybrid modeling method for rotary cement kiln burning zone temperature based on LS_SVM soft measurement
  • Hybrid modeling method for rotary cement kiln burning zone temperature based on LS_SVM soft measurement

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Experimental program
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Effect test

Embodiment

[0033] Firstly, the temperature change of the firing zone is modeled when the coal feed to the kiln head is 11.3t.

[0034] The accurate relationship between coal injection at the kiln head and the temperature of the firing zone can be obtained only when other factors affecting the temperature change of the firing zone are kept stable.

[0035] To ensure the stability of the amount of raw material feeding, the stable value is 133-137A; the outlet temperature of the calciner should also be stable at the benchmark value of 930, and the upper and lower lines are +-30; at the same time, it is necessary to ensure a stable amount of coal injection at the kiln head. The benchmark value is 11.3t; ensure that the grate cooler grate speed is stable between 10-15, so that the secondary air temperature will not be affected by the thickness of the material layer. At the same time, due to the large lag of the cement rotary kiln system, when selecting the variable value, it is necessary to e...

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Abstract

The invention discloses a hybrid modeling method for rotary cement kiln burning zone temperature based on LS_SVM soft measurement. The method comprises the steps that firstly, design data provided by a cement plant are analyzed and processed; by means of the LS_SVM method and the relation between free CaO content and burning zone temperature T, a virtual measurement model for the kiln hood temperature, kiln main machine current and smoke chamber temperature approaching to the burning zone temperature is built; on the basis of the correlation detection amount capable of being collected by a cement production line DCS, a working condition recognizer is used for recognizing two working stations, a DEDS model for the rotary cement kiln burning zone temperature is built, and CVDS models for the burning zone temperature and the coal injection quantity on various working conditions are built respectively. A hybrid model obtained through the hybrid modeling method can be used as a simulation platform to replace an actual rotary kiln for all kinds of control and research in the cement clinker burning process.

Description

technical field [0001] The invention relates to a hybrid modeling method for the firing zone temperature of a cement rotary kiln based on LS_SVM soft measurement, relates to a support vector machine model, and belongs to the field of machine learning modeling. Background technique [0002] In the current cement industry, the rotary kiln has become the main instrument for calcining cement clinker in modern cement production. Since the temperature of the firing zone is extremely high inside the rotary kiln, there is currently no instrument to accurately measure the temperature of the firing zone, and the temperature of the firing zone is one of the important factors affecting the quality of clinker firing. [0003] Because there are many interference factors in the entire rotary kiln control system, it is easy to have sudden changes that are not conducive to the stable operation of the rotary kiln system. Therefore, in order to make the rotary kiln run better and more stably, ...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06K9/62
Inventor 于宏亮张强王芬王孝红孟庆金景绍洪袁铸钢王新江高红卫郑征马小燕刘化果任春理
Owner UNIV OF JINAN
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