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油与煤是两种截然不同的燃料。油发热量高,约为烟煤的两倍,而灰极少,重油的灰份一般为0.2%,最大约为0.5%,因此燃油电厂设备少,占地小,炉型小,布置紧凑。而煤是固体燃料,发热量低,而灰比油多达200到1000倍。一台30万千瓦的燃煤机组要燃煤3500吨/天,除灰约1000吨/天。因此要有煤场、灰场,要有庞大的煤仓和粉仓、上煤和制粉设备以及除灰和除尘设备。
Oil and coal are two distinct fuels. The oil has a high calorific value, about double that of bituminous coal, but very little ash. The ash content of heavy oil is generally 0.2% and the maximum is about 0.5%. Therefore, the power plant has small equipment, small footprint, small furnace size and compact layout. Coal, on the other hand, is a solid fuel with a low calorific value and as much as 200 to 1000 times as much ash as oil. A 300,000 kilowatts of coal-fired units to coal-fired 3500 tons / day, about 1,000 tons of ash / day. Therefore, there must be coal yard and ash yard, there should be a huge coal bunker and bunker, coal and milling equipment as well as ash and dust removal equipment.