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在无烟煤生产中的副产品无烟煤屑是无销路的,在美国东北部的宾夕法尼亚州,这种煤屑堆成了一座座小山。在沸腾床锅炉问世之前,大约有十亿吨这种低热值废物没有被利用,有一些堆在那里长达一个世纪。一项为期两年的试验计划最近已经结束。试验证明了无烟煤屑可以用作工业的燃料。此试验使用一台原型沸腾床锅炉,它安装在宾夕法尼亚州沙莫金地区工业有限公司所拥有的工业区。在试验中,燃用了含有超过66％灰分和低于1998.24千卡/公斤(3600英热单位/磅较高热值)的无烟煤屑及含有更
As-by-product anthracite coal in anthracite production is unprofitable, and in Pennsylvania, northeastern United States, the coal piles pile into a hill. Before the advent of bubbling bed boilers, about a billion tons of this low-calorie waste was unutilized and some pile up there for as long as a century. A two-year trial has recently come to an end. Tests have shown that anthracite coal can be used as a fuel for industry. This test uses a prototype ebullated bed boiler installed in an industrial area owned by the Smokin Regional Industries, Pennsylvania. During the test, anthracite containing more than 66% ash and less than 1998.24 kcal / kg (3600 BTU / lb high calorific value)