大型燃煤火电机组炉前脱硫试验研究

Experimental Study of the Desulfurization in Front of the Furnace in a Large-sized Coal-fired Thermal Power Generation Unit

本文针对西南地区燃烧高硫煤的大型燃煤火电机组,开展炉前脱硫技术试验研究,在某火电厂搭建现场试验平台,采用浮沉筛分的方法对机组常用的不同含硫量的高硫煤进行现场试验,现场试验结果表明:采用炉前脱硫技术能够有效的降低入炉煤硫分,同时能够在一定程度上降低入炉煤的灰分,炉前脱硫技术对于燃煤机组防腐及减排以及设备运行安全都具有重要的作用,仅就所选用高硫煤而言,炉前脱硫能够将入场煤的硫分平均降低约39.12%,能够将入场煤的灰分平均降低约25.01%。

An experimental study of a large-sized coal-fired thermal power generation unit burning coal with a high sulfur content in the southwest region was performed by using the desulfurization technology in front of the furnace. An onthe-spot test platform was built in a thermal power plant and the sink-float sieving method was used to perform an on-the-spot test of coal ranks with various high sulfur contents commonly used in units. The test results show that to adopt the in- front-of-the-furnace desulfurization technology can effectively lower the sulfur content of coal entering into the furnace and at the meantime can drop the ash content of the coal to a certain extent. The in-front-of-thefurnace desulfurization technology can play an important role in preventing corrosion,reducing the emissions and securing a safe operation of equipment items in coal-fired units and is also significant for large-sized coal-fired units. Only in terms of coal ranks with a high sulfur content chosen,the in-the-front-of-the-furnace desulfurization can force the sulfur content of coal entering into the furnace to averagely lower by about 39. 12% and the ash content of the coal to averagely reduce by around 25. 01%.