套筒对烧石灰窑燃烧电石尾气和高炉煤气的对比分析

Comparative analysis of calcium-carbide tail gas and blast furnace gas as fuel of annular shaft kilns with opposite burners(OBASKs)

燃料消耗是影响套筒对烧石灰窑(Annular shaft kiln with opposite burners,OBASK)节能减排的重要因素。为了提高OBASK的能效,减少碳排放,本文从燃料种类出发,基于METSIM软件对比分析燃料为高炉煤气和电石尾气时,OBASK的能量效率、燃料成本以及CO_(2)排放量在数值上的差异。结果表明:当燃料用电石尾气替代高炉煤气时,OBASK的能量效率提高了4.77%;燃料消耗大幅减少,仅为原来的30%;生产每吨石灰CO_(2)排放减少了325.01 kg。因此,套筒对烧石灰窑采用电石尾气作为燃料的方案,在实现工业副产有效利用的同时,还增加了经济利益和环保收益。

Fuel consumption is an important factor affecting energy conservation and emission reduction of OBASKs.To promote the energy efficiency of OBASK and reduce carbon emission,targeting at the fuel type,this paper replaced the original blast furnace gas with calcium carbide gas of higher calorific value and analyzed the numerical differences in the energy efficiency of OBASK,fuel cost,and CO_(2) emission based on METSIM.The results indicate that when the calcium carbide gas is adopted to replace blast furnace gas,there is an increase of 4.77%in energy efficiency of OBASK,a sharp decrease(only 30%of the original)in fuel consumption,and a decrease of 325.01 kg in CO_(2) emission for per ton of lime production.Therefore,calcium carbide gas is recommended as the fuel of OBASKs to boost economic interest and environmental benefits in addition to realizing effective utilization of industrial by-products.