What is solid fuel?
Solid fuels are contrasted with gaseous fuels and liquid fuels. Solid fuel is used to burn and produce energy through combustion and exchange that heat through cauldron boilers in to water. There are various types of solid material that are used as solid fuel.
Here are some of most common solid fuels:
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coal,
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wood,
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wood pellet,
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biomass, peat,
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hexamine fuel tablets
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grains.