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一、前言众所周知,无烟煤是一种碳化程度高、挥发份很低的煤种。按美国材料试验协会(ASTM 标准)规定:无烟煤的可燃基挥发份(无水无灰基)为2～8%,可燃基固定碳为92—98%。无烟煤的挥发份组成中,热值较高的氢含量很少,其固定碳与含氢量之比一般都大于20。因此,无烟煤的燃烧要比其它煤种困难得多。设计无烟煤锅炉的燃烧装置时必须考虑这一特点,采取特殊的结构与措施以改善无烟煤的着火及燃烧过程。
First, the preamble As we all know, anthracite is a high degree of carbonation, low volatile coal. According to the American Society for Testing and Materials (ASTM standard) provides: anthracite combustible radical volatile (anhydrous ash-free base) is 2 to 8%, combustible base fixed carbon is 92-98%. Anthracite volatile composition, the calorific value of hydrogen content is very small, the fixed carbon and hydrogen content ratio is generally greater than 20. As a result, anthracite burning is much more difficult than other coal types. When designing a combustion device for an anthracite boiler, this feature must be taken into account and special structures and measures should be taken to improve the ignition and combustion process of anthracite.