采煤工作面高效空冷器研究
发布时间：2018-11-08 15:57
【摘要】：随着矿井开采深度的增加以及综合机械化水平的提高,高温热害现象越来越严重。当前矿井降温理论已形成比较完整的理论体系,矿井局部降温技术及矿井末端空冷器的研制技术也较为成熟,但是在采煤工作面上进行降温的研究还很少。因此,对采煤工作面高效空冷器进行研究将是矿井局部降温中急需解决的一个问题。本文对采煤工作面周围的散热介质与风流间热交换情况进行理论分析,提出了采煤工作面温度分布函数关系;根据采煤工作面工人的实际工作情况,提出了有效需冷区域;将射流理论运用到空冷器风口射出冷风流方面,理论上确定了空冷器的相关性能参数与采煤工作面风流温度间的关系,并结合采煤工作面温度分布函数关系式,对采煤工作面上空冷器布置的理论间距和数量进行了确定;运用矩阵理论对空冷器性能参数的合理设计进行了方案优化。根据某一采煤工作面实际情况对空冷器性能参数进行了优选,最终确定的最优方案为空冷器的半径为0.09m,送风速度为2.4m/s,送风温度为22℃C;具体布置为:在距采煤工作面进风端0-63m,每3个液压支架布置一个空冷器,布置14个;在60-99m,每2个液压支架布置一个空冷器,布置13个;在99-150m,每1个液压支架布置一个空冷器,布置31个,共布置58个空冷器。为进一步验证本理论的可行性,运用ANSYS中Fluent模块结合采煤工作面实际情况及理论优选方案确定的参数进行了风流温度场模拟,模拟结果显示,在满足采煤工作面温度不得高于26℃C的前提下,第14个空冷器有效降温距离为4.5m,第27个空冷器有效降温距离为3.5m,第58个空冷器有效降温距离为3.5m,满足了理论上布置第1-14个空冷器有效降温距离为4.5m,理论上布置第15-27个空冷器有效降温距离为3m,理论上布置第28-58个空冷器有效降温距离为1.5m的要求,模拟结果与理论研究相吻合。本研究为矿井降温技术提供了一定的理论价值。
[Abstract]:With the increase of mining depth and the improvement of comprehensive mechanization, the phenomenon of high temperature thermal damage is becoming more and more serious. At present, the theory of mine cooling has formed a relatively complete theoretical system, and the technology of local cooling and the development of the air cooler at the end of the mine are also relatively mature, but the research of cooling temperature on the coal face is still rare. Therefore, the study of high efficiency air cooler in coal mining face will be an urgent problem to be solved in local cooling of coal mine. Based on the theoretical analysis of the heat exchange between the radiating medium and the air flow around the coal face, the relationship between the temperature distribution function of the coal mining face and the actual working conditions of the workers in the coal mining face, the effective cooling area is put forward in this paper. In this paper, the jet theory is applied to the cold air flow from the air cooler nozzle, and the relationship between the relevant performance parameters of the air cooler and the air flow temperature in the coal mining face is theoretically determined, and the relationship between the temperature distribution function of the coal face and the temperature distribution function of the coal mining face is also given. The theoretical spacing and quantity of air cooler arrangement on coal mining face are determined. The optimal design of air cooler performance parameters is carried out by using matrix theory. According to the actual situation of a coal mining face, the performance parameters of the air cooler are optimized. The optimum scheme is that the radius of the air cooler is 0.09 m, the air velocity is 2.4 m / s, and the air supply temperature is 22 鈩，
本文编号：2318957
[Abstract]:With the increase of mining depth and the improvement of comprehensive mechanization, the phenomenon of high temperature thermal damage is becoming more and more serious. At present, the theory of mine cooling has formed a relatively complete theoretical system, and the technology of local cooling and the development of the air cooler at the end of the mine are also relatively mature, but the research of cooling temperature on the coal face is still rare. Therefore, the study of high efficiency air cooler in coal mining face will be an urgent problem to be solved in local cooling of coal mine. Based on the theoretical analysis of the heat exchange between the radiating medium and the air flow around the coal face, the relationship between the temperature distribution function of the coal mining face and the actual working conditions of the workers in the coal mining face, the effective cooling area is put forward in this paper. In this paper, the jet theory is applied to the cold air flow from the air cooler nozzle, and the relationship between the relevant performance parameters of the air cooler and the air flow temperature in the coal mining face is theoretically determined, and the relationship between the temperature distribution function of the coal face and the temperature distribution function of the coal mining face is also given. The theoretical spacing and quantity of air cooler arrangement on coal mining face are determined. The optimal design of air cooler performance parameters is carried out by using matrix theory. According to the actual situation of a coal mining face, the performance parameters of the air cooler are optimized. The optimum scheme is that the radius of the air cooler is 0.09 m, the air velocity is 2.4 m / s, and the air supply temperature is 22 鈩，
本文编号：2318957
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