Development Of Utilization System For Multi-residual Heat Resources Of Mine And Experimental Research

The coal mine enterprises are high energy-consumption,and have many kinds of the low temperature waste heat resources,such as the mine drainage,the mine ventilation,the living hot water and the air compressor machine room cooling water,But the low temperature waste heat resources have not been used because these enterprises are not lack of energy;it is not only caused the waste of resources,but also caused the thermal pollution,dust pollution and noise pollution.Mean while,the coal mines need many kinds of heat load that generally used coal fired boiler,such as the heat of wellhead antifreeze,the living hot water and the building heating,using coal fired boiler consume a large amount of coal as well as a large amount of pollution for the environment.In order to solve this situation of energy utilization,the multi-residual heat resources system and related devices are developed in this paper.The mine ventilation waste heat recovery unit uses the spray water as the energy carrier to recycle heat and removed dust.The water source heat pump system of mine waste heat is the technology which is combined of the mine waste heat resource and the water source heat pump.It forms a set of independent system using itself waste heat energy.Through the study of mine ventilation waste heat recovery unit,we can know:when the other parameters are constant,the wind speed in 1m/s to 3m/s,the heat transfer efficiency is highest when the wind speed is lm/s;the wind temperature is 17? to 23 ?,the heat transfer efficiency is highest when the wind temperature is 23 ?;the water temperature is 8? to 12?,the heat transfer efficiency is highest when the water temperature is 12?;the relative humidity is 50%to 90%,the heat transfer efficiency is highest when the relative humidity 50%;the dustiness is 15mg/m3 to 55mg/m3,the dust removal efficiency is highest when the dustiness is 55mg/m3,as the same time,the dust removal efficiency is higher when the inlet air dustiness increased.According to the data that collect from the Sihe coal mine of Shanxi jincheng anthracite mining group co.,LTD,we can know that the temperature of the mine drainage is stable at 17?,the average temperature of the mine ventilation is stable at 17?,the relative humidity is stable at 70%.In addition,the temperature of the air compressor cooling water is 40??45?,the heat can be used separately.According to the research on the mine ventilation waste heat recovery unit,the total heat exchange efficiency is 35.25%,the first level efficiency is 26.09%and the second efficiency is 64.60%;recover the water source should use 16 sets of 1194 kW water heat pumps,that can replace 3 sets of 15t hot water boiler,it can provide 13524.2 kW,reduce 64479 t/a of C02,1940 t/a of S02,970 t/a of NOx,17588 t/a of dust;as the same time,the solar heating device and the air source heat pump can be used as supplementary heat source of the system,to provide more heat.They can ensure the heating capacity any situation.Utilization of the mine waste heat resource is the inevitable trend of coal mine enterprises for circular economy development.The development and application of the utilization technology of mine waste heat resource have the important economic and social effects.