Study On Cooling Method And Flow Law For Snake Movement Cooler Clinker

Cement production is a industry with high energy waste and high pollution. The energy saving and emission reduction of the cement production are hot issues in domestic and international research. Cement grate cooler is the critical equipment in cement production line which takes the clinker of high temperature from cement kiln, and recovers the heat energy. Aiming at the key problems of clinker cooling and conveyance, this paper analyze the reason of inhomogeneous cooling condition and improved the design theory of cooling air flow regulator. The simplified design method and structure are presented. With further study of the flowing law of the clicker in the cement cooler, a new serpentine clicker pushing method is proposed to make clicker granule shifting in large scale in three dimensional directions, which is proved to be right by experiment. The research result lay a foundation for improve cooling efficiency of cement clicker in theory and technique.At first, the clicker cooling status in grate cooler is analyzed. The district element method is used to cooling clicker for purpose of balanced cooling. The element flow varying model is established according to coefficient of flow resistance. With conclusion of the four measures for diminishing change rate of flow resistance coefficient, the corresponding cooling gas flow control model is established. Based on classic equation of seepage mechanics, we developed the flow resistance coefficient changing expression for designing of the flow regulator. A new type regulator is designed which tested on the established experimental platform.Second, with analysis of the fourth generation grate cooler, the evaluation method of convey energy waste and disturbance of the grate cooler is proposed. The ideal clicker conveyance model is established for comparison with other kinds of grant cooler. The parameters of energy waste in clicker conveyance and disturbance in conveying procedure are defined. Based on the established evaluation method, the computation of energy waste coefficient and disturbance coefficient is made, took two classic fourth generation of grant cooler for object.Third, a new issue of bionics is raised according to convey method of clicker. With analysis of four kinds of classic snake movement, the serpentine motion mode is selected for imitation. The serpentine movement model is used to establish a new clicker pushing structure of grant cooler. Considering the granular character of clicker, the fluidity of clicker in the new pushing structure is analyzed using granular mechanics theory. The experimental equipment of the new pushing structure is designed to verify the convey capability.Then, combining the theory of cellular automata and discrete element, a distinct element and cellular method is proposed. The granule contact model and formula are established for evolution rules of the distinct element and cellular method. The programming thoughts and flow chart are presented in MATLAB platform.At last, the experiments of the granule convey capability, the granule mixed capability and the granule flow tracks are conducted. With comparison of the experiment results, the simulation of clicker flow track is proved feasible by the proposed distinct element and cellular method.