CAJ | 학술논문

为了改善破碎硐室粉尘质量浓度超标的现状，获取合理的通风除尘参数，根据相似原理，结合气固两相流的运动方程，导出了模拟破碎硐室粉尘运动的相似准则数，建立了破碎硐室相似模型，运用Fluent软件对破碎硐室相似模型粉尘质量浓度分布进行数值模拟，并与相似实验数据对比分析，模拟结果与实验数据基本吻合．研究结果表明：捕捉壁面条件下粉尘质量浓度较之反弹壁面要低；入口风速为0．2～0．5 m／s时，粉尘质量浓度随风速的增大逐步降低．安装抽风除尘系统后，粉尘质量浓度基本保持在2 mg／m3以内，平均除尘率高达90％以上．
위료개선파쇄동실분진질량농도초표적현상，획취합리적통풍제진삼수，근거상사원리，결합기고량상류적운동방정，도출료모의파쇄동실분진운동적상사준칙수，건립료파쇄동실상사모형，운용Fluent연건대파쇄동실상사모형분진질량농도분포진행수치모의，병여상사실험수거대비분석，모의결과여실험수거기본문합．연구결과표명：포착벽면조건하분진질량농도교지반탄벽면요저；입구풍속위0．2～0．5 m／s시，분진질량농도수풍속적증대축보강저．안장추풍제진계통후，분진질량농도기본보지재2 mg／m3이내，평균제진솔고체90％이상．
To improve the situation of dust concentration exceeds in crushing chamber and obtain rational parameters for the design of dust removal by ventilation, due to the similarity theory and the motion equations of gas?solid two?phase flow, the similarity index was educed and a similarity model device was designed for the specific situation in the crushing chamber. Furthermore, the dust concentration distribution of similarity model in crushing chamber was simulated by using software named Fluent. After the comparison with similar experimental data analysis, the result showed that the simulation result was consistent with the experimental data. Therefore, the results indicated that dust concentration in chamber under trap wall condition is lower than it under the reflect condition. When the wind velocity at entrance was in the range of 0.2 m/s to 0.5 m/s, dust concentration gradually reduced with the increasement of wind velocity. Finally, after the installation of downdraught dedusting system, the dust concentration was below 2 mg/m3 , and the average removal rate reached 90%.