熔盐对红焦显热热能交换的探索实验研究

Experimental Study on Sensible Heat Energy Exchange of Red Coke by Molten Salt

我国是焦炭生产第一大国,若对红焦熄焦时产生大量的热能进行回收再利用,不但可以增加企业效益,而且还可以减排降碳,保护生态环境。鉴于此,利用熔盐吸热储能、热容性高的特性,创新性地提出通过红焦显热热能与盘管内低温熔盐对流传热,将红焦热能传递并储存于熔盐的一种红焦热能交换和干法熄焦的工艺路线。通过建立熔盐在熄焦炉内热能转换方程和数学模型,并结合实验分析不同热流密度和压强下熔盐质量流量与温度的关系,及不同压强下熔盐吸热能力,验证了利用熔盐进行干法熄焦工艺具有一定的可行性。

China is the largest country in coke production.The recovery and reuse of a large amount of thermal energy generated during the quenching of red coke can not only increase enterprise benefits,but also reduce carbon emissions and protect the ecological environment.Taking advantage of the high heat capacity of molten salt for heat absorption and energy storage,this paper creatively proposes a process route of red coke heat exchange and dry quenching,which transfers and stores the red coke heat energy in molten salt through the convection heat transfer between the red coke sensible heat energy and the low-temperature molten salt in the coil.By establishing the heat energy conversion equation and mathematical model of molten salt in the coke quenching furnace,and combining with experiments,the relationship between the mass flow rate of molten salt and temperature under different heat flux and pressure,and the heat absorption capacity of molten salt under different pressure are analyzed,which verifies that the dry quenching process with molten salt is feasible.