褐煤低温改质过程中的换热特性

HEAT EXCHANGE CHARACTERISTIC OF LIGNITE DURING UPGRADING PROCESS WITH LOW TEMPERATURE

为研究褐煤低温改质过程中气固两相间换热特性,以大型CFD数值模拟软件Fluent为平台,采用SIMPLE算法和Eulerian模型,以锡林浩特10mm小颗粒褐煤为例,对气固两相流动的传热传质特性进行了数值模拟.模拟结果与实际工况基本一致,气相流速对炉内各截面的温度分布影响较大,对研究发生炉内的换热特性具有一定的理论指导意义.

To study heat exchange characteristic of lignite during upgrading process with low temperature, using the software of CFD based on Fluent platform, with SIMPLE algorithm and Eulerian model, taking Xilinhaote lignite particles of 10 mm as example, with the numeric analogue of computer, proceeded numeric research of G-S two phases heat exchange characteris- tic. The results of numerical simulation are almost corresponding with the operating mode, veloc- ity of G-phases is the main factor effecting distribution of section temperature inside furnace body, providing theoretical guide for studying heat exchange characteristic in producer.