Abstract

The catalytic combustion of peat, anthracite, and their mixture in a ratio of 40 : 60 wt % was studied. The addition of peat with a high yield of volatiles to anthracite increased the degree of burnout of the mixture. When the commercial aluminum-copper-chromium oxide catalyst IK-12-70 was used (bed height 1 m, process temperature 700–750°C, particle size of solid fuel less than 1.25 mm), the degree of burnout was 98.2% (peat), 50.9% (anthracite), and 74.2% (peat–anthracite mixture). For large particles of a shaped peat–anthracite mixture with an equivalent diameter of 11.6–18.6 mm, burnout in the upper part of the fluidized bed of the catalyst was 80.5%. The degree of burnout of large particles fed into the lower part of the fluidized bed was evaluated taking into account the degree of burnout of small particles that passed the bed. When large particles of the shaped peat–anthracite mixture were fed, burnout reached at least 95% at a temperature of 700–750°C and a catalyst bed height of 1 m. To avoid accumulation of ash particles in the fluidized bed, the particle size of peat and anthracite in the shaped fuel should not exceed 1–1.5 mm when using a catalyst with a particle size of 2 mm.

中文翻译：

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泥炭和无烟煤在流化床中的催化共燃烧

摘要

研究了泥炭，无烟煤及其混合物以40:60 wt％的比例进行的催化燃烧。向无烟煤中添加高挥发物的泥炭会增加混合物的燃尽程度。当使用市售的铝铜铬氧化物催化剂IK-12-70（床高1 m，工艺温度700-750°C，固体燃料的粒径小于1.25 mm）时，燃尽率为98.2％（泥炭），50.9％（无烟煤）和74.2％（豌豆-无烟煤混合物）。对于当量直径为11.6-18.6毫米的较大形状的泥炭-无烟煤混合物，催化剂流化床上部的燃尽率为80.5％。考虑到通过床的小颗粒的燃烧程度，评估进料到流化床下部的大颗粒的燃烧程度。当进料较大颗粒的泥炭－无烟煤混合物时，在700–750°C的温度和1 m的催化剂床层高度，燃尽率至少达到95％。为避免灰烬颗粒在流化床中积聚，当使用粒径为2 mm的催化剂时，成型燃料中泥炭和无烟煤的粒径不应超过1-1.5 mm。