Optimization method and system for reconstruction error compensation of combustion field of cement rotary kiln and storage medium

Abstract

The invention provides an optimization method and system for reconstruction error compensation of a combustion field of a cement rotary kiln and a storage medium and the method comprises the steps: firstly carrying out combustion field reconstruction of the rotary kiln in a main link of cement clinker calcination by a finite element analysis method, and building a combustion field finite element model of the rotary cement kiln; secondly, proposing a rotary cement kiln combustion field reconstruction error compensation method based on a fuzzy inference system and a deep neural network by adopting a data driving thought for errors existing in rotary cement kiln combustion field reconstruction and an actual in-kiln calcination process, and constructing a reconstruction error compensation model to compensate and correct temperature errors obtained by the reconstruction model; and finally, improving the modeling precision of the reconstruction error compensation model by adopting a reconstruction error compensation model online optimization method based on a rolling optimization thought. The state of the combustion field in the kiln can be analyzed and evaluated in real time, and the problems of low efficiency and low precision in traditional simulation of the combustion field in the rotary kiln are solved through real-time correction of simulation data and actual production data.

Description

technical field [0001] The invention relates to the technical field of mechanism simulation of a cement rotary kiln combustion field, in particular to a reconstruction error compensation and optimization method, a storage medium and a system of a cement rotary kiln combustion field based on a combination of finite element modeling and data drive. Background technique [0002] The rotary kiln is the main equipment for cement clinker calcination, and the coal consumption of clinker calcination is the main energy consumption of the whole sintering process. The temperature distribution in the rotary kiln directly reflects the combustion state in the kiln and is a comprehensive reflection of the operating parameters of the rotary kiln. The thermal efficiency of the rotary kiln is closely related to the temperature distribution. Studying the temperature modeling method of the cement rotary kiln combustion field, establishing an accurate cement clinker calcination process temperatu...

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Problems solved by technology

[0003] At present, it is difficult to use sensing technology to solve the problem of monitoring the temperature distribution inside the kiln. Through finite element simulation, a small amount of data can be used to simulate the combustion state inside the kiln. Combining the simulation technology with real-time production data, the mechanism-based The digital twin of the simulation will be able to fundamentally solve the unmeasurable problems inside the kiln, and analyze and evaluate the material distribution, gas distribution and combustion field status of the production process in real time

However, due to many uncertain factors such as non-ideal boundary conditions and finite element discretization, the finite element model must have modeling errors, which in turn restricts the optimal control of the cement clinker calcination process based on the temperature in the kiln, making it difficult to improve calcination efficiency and reduce coal consumption.

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