冻结管保温效果研究  

Study of the Insulation Effect of Freezing Pipes

作　　者：黄井武 王建平[2] 王恒[2] 

机构地区：[1]山东丰源实业有限公司,山东枣庄277000 [2]煤炭科学研究总院,北京100013

出　　处：《冰川冻土》2011年第3期551-556,共6页Journal of Glaciology and Geocryology

基　　金：国家科技支撑计划项目(2006BAB16B01)资助

摘　　要：针对当前多圈孔冻结造成的冷量分配不合理以及大圈径冻结孔布置与永久井架基础的矛盾,运用现场实验与数值模拟对比分析冻结器套管抽真空保温与聚氨酯保温的优劣性.实验表明:在目前技术水平下套管抽真空真空度不够导致隔温效果差、持续时间短;采用聚氨酯保温冻结器,管外土体降温梯度小于未保温情况,且与未保温冻结器管外温差随冻结期增长趋于稳定.在目前施工技术水平下,用聚氨酯对冻结器进行保温是非常有效的.Aiming at the no uniform cold distribution in the multi-coil freezing and the contradiction between the large-coil-diameter layout of freezing holes and the stability of the everlasting head frame base,in-situ test and numerical simulation are carried out to compare the superiority-inferiority of the casing-pipe-vacuumized insulation and the polyurethane insulation on the freezing pipes.The tests show that： under the current technique,vacuumized insulation has the shortage of short using duration because of no enough vacuum degree;after the freezing pipe is insulated by polyurethane,the temperature gradient is less than that of no insulation,and the temperature difference between the pipes insulated by polyurethane and no insulation will be stable as the freezing period increases.Finally,it is pointed out that polyurethane insulation is quite efficient in present freezing construction technically.

关 键 词：冻结管 保温 聚氨酯 节能 

分 类 号：TD265.3[矿业工程—矿井建设]