新型复合保温技术在工业园区集中供热改造项目中的应用

Application of new composite insulation technology in the project ofcentral heating transformation in the industrial park

为了提高蒸汽输送效率并降低管网损失,以工业园区集中供热蒸汽管道为研究对象,采用新型复合保温技术对1438 m的DN 250架空管道和403 m的DN 150架空管道进行改造,通过现场测试和理论分析方法分析了实施效果。结果表明:经过保温改造后,DN 250和DN 150蒸汽管道表面的温度差(平均温度与环境温度差值)分别下降了10.8℃和8.3℃;DN 250蒸汽管道散热损失由177.9 W/m^(2)降低至52.3 W/m^(2),DN 150的蒸汽管道散热损失由131.4 W/m^(2)降低至34.9 W/m^(2)。

In order to improve the efficiency of steam transmission and reduce the loss of pipe network,the overhead pipelines of 1438 m DN 250 and 403 m DN 150 in the industrial park were reconstructed by a new composite insulation technology.The implementation effect was analyzed through field test and theoretical analysis.The results show that the temperature differences between the ambient temperature and the average temperature of the surface of DN 250 and DN 150 steam pipelines decrease by 10.8℃and 8.3℃respectively after thermal insulation reconstruction.The heat loss of DN 250 steam pipe is reduced from 177.9 W/m^(2)to 52.3 W/m^(2),and that of DN 150 steam pipe is reduced from 131.4 W/m^(2)to 34.9 W/m^(2).