Self-adaptive temperature optimization control method under all working conditions of cement calcination decomposing furnace

Abstract

The invention discloses a self-adaptive temperature optimization control method under all working conditions of a cement calcination decomposing furnace. The method comprises steps as follows: a GPC (generalized predictive controller) is established on the basis of a predictive control algorithm of an input / output parameterized model, wherein input variables comprise the kiln tail coal feeding quantity, the kiln feeding quantity, the tertiary air temperature and the smoke chamber temperature, and the output variable comprises the decomposing furnace outlet temperature; control model parameters are set, and the GPC is initialized; input / output variable signals are acquired in real time and fed back to the GPC; the GPC performs self-correction on the control model parameters according to the actual value and the predicted value of the output variable, works out input variable controlled quantities and outputs control commands to an executing device; the executing device controls the kiln tail coal feeding quantity and performs self-adaptive adjustment on the supply quantity of the kiln feeding quantity according to the decomposing furnace outlet temperature; recycle and feedback control is performed until the technological process is ended. The mathematical model better conforming to actual production working conditions is established for control, and the control effect is more accurate.

Description

Technical field [0001] The invention relates to a method for controlling the outlet temperature of a calciner, in particular to a method for self-adaptive temperature optimization control of a cement burning calciner in all working conditions. Background technique [0002] In the production process of the cement precalciner kiln system, the outlet temperature of the calciner is a very important process parameter, which can characterize the combustion in the cement kiln and the decomposition of materials. Therefore, the stability of the outlet temperature of the calciner has a very important impact on the stability of the entire cement production line and the improvement of product quality. However, the outlet temperature of the calciner is a complex control object with pure lag, large inertia, nonlinearity, and coupling of multiple variables. There are many influencing factors, and the coupling between the factors is very strong, and it is difficult to control with simple convent...

AI Technical Summary

Problems solved by technology

For the temperature control of the outlet of the cement calciner, fuzzy control, simple PID control, or univariate predictive control are commonly used at present, and the above methods do not control the amount of coal fed at the kiln tail, the amount of kiln fed, the tertiary wind temperature and the smoke temperature. Several important influencing factors of room temperature are taken into consideration.

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