小纪汗煤矿矿井水余热大温差双级取热系统研究

Research on the dual stage heatextraction system with large temperature difference and residual heat of mine water in Xiaojihan Coal Mine

小纪汗煤矿现供热热源为2台20 t/h和1台10 t/h燃煤锅炉,由于锅炉年久老化,极端天气时供热效果差,同时不符合环保政策要求,因此需进行淘汰拆除。考虑到该煤矿井下涌水余热资源丰富(水量1268 m^(3)/h,水温18℃),采用大温差双级取热热泵技术,利用井下涌水余热,替代现有燃煤锅炉,解决全矿供热需求,一级取热温差为18~11℃,二级取热温差为11~5℃,达到余热深度回收、节能减排、减员增效的效果。

The current heating sources for Xiaojihan Coal Mine are two 20 t/h and one 10 t/h coal-fired hot water boiler.The boilers are aging and have poor heating effects in extreme weather conditions.At the same time,they do not meet environmental protection policy requirements and need to be eliminated.Considering that the coal mine has abundant water inflow and waste heat resources underground(with the water volume of 1268 m 3/h and the water temperature is 18℃).This project uses a large temperature difference and two-stage heat pump technology to utilize the waste heat from underground water inflow,replacing existing coal-fired boilers to meet the heating needs of the entire mine.The temperature difference for the first stage heat pump is 18~11℃,and the temperature difference for the second stage heat pump is 11~5℃.Achieve the effects of deep waste heat recovery,energy conservation and emission reduction,and reducing staff and increasing efficiency.