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Question:

What kind of coal is needed in a thermal power plant?

What kind of coal is needed in a thermal power plant?

Answer:

There are two kinds of boiler used in power plant: pulverized coal boiler and circulating fluidized bed boiler. Because the design of equipment conditions and characteristics of pulverized coal furnace for heat power coal demand higher, generally greater than 4000 kcal (to ensure that the temperature of the furnace, so as to avoid the fire or deflagration accident) is used, the pulverized coal combustion of coal ash is relatively small, generally less than 30%, and the desulfurization equipment of pulverized coal furnace the cost is expensive, so the sulfur content of coal required as small as possible; and the circulating fluidized bed boiler mainly for inferior coal and coal, to very low, generally greater than 2500 kcal of coal can burn (low, and easy to fire) desulfurization equipment cheap (the limestone addition of sulfur furnace) the amount of coal is very low, generally speaking, circulating fluidized bed boiler with coal is composed of two kinds of coal blending, a kind of heat is relatively high, the other is the inferior coal (coal and other industries it is difficult to use,.
Thermal coal (steam coal).Many large thermal power plants use this kind of coal.General requirements for receiving base low heat is greater than 5000 (KCal/kg), received less than 15 base ash (%), sulfur content of as low as possible.
The main lignite, long flame coal, non caking coal, lean coal and a small amount of anthracite. From the commodity coal, the main washing mixed coal, washed coal, coal, coal, etc.. Poor coal. The coal used in thermal power plant is usually referred to as the power coal, and the classification method is mainly based on the dry and ash free volatile components. In terms of power coal, lignite, long flame.

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