Evaluation and correction method and device for thermal efficiency online calculation parameters of rotary cement kiln

Abstract

The invention discloses an evaluation and correction method and device for thermal efficiency online calculation parameters of a rotary cement kiln. The method comprises the following steps that a quality threshold value of a deviation thermal efficiency parameter in the frequent operation process of the rotary cement kiln is calculated; the real-time thermal efficiency parameter standard deviation of the rotary cement kiln is calculated by using a thermal efficiency model; the real-time thermal efficiency parameter calculation standard deviation and the quality threshold value of the deviation thermal efficiency parameter are compared, and parameter data for carrying out thermal efficiency calculation of the rotary cement kiln are determined; and the in-kiln secondary inlet air quantity is corrected and calculated. According to the method and device, the problem that part of parameters are mismatched along with continuous production when the thermal efficiency model participates in field actual calculation is successfully solved, the calculation accuracy of the thermal efficiency model is ensured, and the thermal efficiency online calculation accuracy in the cement clinker sintering process is improved.

Description

technical field [0001] The invention relates to an evaluation and correction method and device for on-line calculation parameters of the thermal efficiency of a cement rotary kiln, and belongs to the technical field of energy saving and emission reduction of cement production lines. Background technique [0002] The cement industry is one of the important industries of my country's national economy. Building intelligent cement factories and improving the digitalization, intelligence, and greening of cement enterprises have become the main development direction of the cement production industry. [0003] Paying attention to the firing process of cement clinker, combined with the production process, and improving the thermal efficiency of production are the key to reducing energy consumption and improving the effective utilization of energy. The mass balance, heat balance and thermal efficiency of the production process are the main methods and approaches to understand the ene...

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Problems solved by technology

Most of the current research direction is to analyze and study the thermal efficiency of the cement clinker firing process from an overall perspective. When the thermal efficiency model participates in the actual calculation on site, as the production continues, some parameters appear to be mismatched, resulting in the cement clinker firing process. There is a phenomenon that the thermal efficiency is greatly reduced in the

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