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鉴于国产100MW油炉炉膛容积热负荷q(?)值较低,约为921×10~3kJ/m~3·h.过热器区域烟速为9～10m/s,接近于燃烟煤炉。因此有利于采用常规燃煤技术进行油炉改造,其手段无非有扩(或加)、挖、抬三种形式。其中将炉膛向炉前方向扩展,以增加受热面的方法是改造简便、投资少,效果好的方法。同时为减少油改煤工作的难度,应提供电厂5500Kcal/kg.V(?)25%的优质烟煤、除少数灰熔点低而煤源能长期稳定供给,须选用液态排渣炉外一般应考虑改为固态排渣煤粉炉。本文例举二个1OOMW油炉电厂,天津杨柳青电厂因改炉后选用灰熔点低,灰分少的神木烟煤.建议改为开式液态排渣煤粉炉。另一个为武汉青山热电厂,预计使用一般烟煤,故推荐改为固态排渣煤粉炉。
In view of the low q (?) Value of the furnace volume heat load of domestic 100MW oil-fired furnace, it is 921 × 10 ~ 3kJ / m ~ 3 · h, and the smoke velocity in the superheater zone is 9 ~ 10m / s. Therefore, the use of conventional coal-fired furnace technology is conducive to the transformation, its means nothing more than expanding (or Canada), digging, lifting the three forms. Among them, the method of extending the hearth to the front of the furnace to increase the heating surface is a simple and convenient method with less investment and good effect. At the same time, in order to reduce the difficulty of coal reforming, high-quality bituminous coal of 5500Kcal / kg.V (?) 25% should be provided. In addition to the low melting point of coal and the long-term stable supply of coal source, Change to solid state slagging pulverized coal stove. This paper presents two 1OOMW oil-fired power plant, Tianjin Yangliuqing Power Plant after the selection of ash after the ash melting point low, less ash Shenmu bituminous coal. Proposed to open the liquid slagging pulverized coal furnace. Another is the Qingshan Thermal Power Plant in Wuhan, which is expected to use common bituminous coal, so it is recommended to change to a solid state slagging pulverized coal fired furnace.