Research On Thermal Efficiency Monitoring System Of Grate Cooler

China is the world’s largest producer and consumer of cement.The improvement of technology,management and equipment in the cement production process can bring considerable economic benefits to enterprises and meet the national demand for "Green Manufacturing" at the same time.The grate cooler is an indispensable part of the cement firing system.Its main function is to cool the high temperature cement clinker quickly and recover the excess heat.Grate cooler heat efficiency monitoring system is the result of new dry process cement clinker production process technology upgrades and the government of "Made in China 2025" in the dual requirement of the sustainable development of manufacturing,grate cooler as the core device of NSP cement production process,to maintain the stability of its operation and heat recovery efficiency is critical,Therefore,it is of practical significance to establish the thermal efficiency monitoring system of grate coolers.Based on the industry background and scholars’ research,the thermal efficiency monitoring system of grate coolers needs to be studied in three stages,namely,the analysis of the key factors of thermal efficiency,the analysis of working conditions and the building of the thermal efficiency monitoring system module.The three stages must be analyzed step by step in order to achieve the purpose of online thermal efficiency analysis and monitoring.In order to study the key factors of thermal efficiency,this paper analyzes the working principle and heat transfer process of grate coolers,and obtains the method for calculating the thermal efficiency of grate coolers.Analysis of key factors affecting the thermal efficiency of the grate cooler,only through the grate cooler internal heat exchange process to qualitative analysis under the grate pressure and the relationship between each factor domestic sex difference,cannot satisfy the need of actual production,so this article combined with the actual operation data,using the method based on the relative importance of objectively analyze the key factors,and the new characteristics of weight,the results can guide the classification of grate cooler working state.For the classification of working state,the feature weight obtained is combined with the unsupervised clustering algorithm k-means++,which makes the algorithm more sensitive to key factors and the results obtained more targeted.At the same time to obtain the boundary of the detailed parameters,design based on the cluster in the state of the distance between the boundaries of cluster method,by defining the unilateral boundary point,some concepts such as fuzzy boundaries,divides the grate cooler working state borders,get the thermal efficiency of the grate cooler under different working condition,and on this basis,completes the work state recognizer module design.Based on the above experimental results and theoretical knowledge,the design of grate cooler thermal efficiency monitoring system is finally completed.The system can realize online calculation of thermal efficiency,identification of working state,data processing and other functions.The establishment of the thermal efficiency monitoring system for grate coolers has practical significance for improving the decision-making level of front-line operators,maintaining the stable operation of grate coolers,improving the thermal efficiency of grate coolers,reducing the energy consumption in cement production process and increasing the profits of cement production enterprises.