Combustion is the controlled burning of that waste material which cannot be recycled or composted. It is an attractive alternative for disposal of packaging materials. Combustion incinerators are equipped to produce steam that can be utilized either to provide heat or produce electricity. In fact, plastics are made from petroleum feed stock and therefore contain a high heat content that is a benefit for waste-to-energy incineration.
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There are three types of incinerators (also named as Municipal Waste Combustors – MWCs); mass-burn-incinerators, refuse-derived fuel incinerators and modular combustors.
These incinerators can accept such type of materials which are too large to go through the feed system. There is a grate which moves through the combustors carrying integrated waste placed on it. Air is pushed into the system from above and below the grate to help complete combustion. Mass-burn incinerators are different from other MWCs because it has a single stationary chamber. These are constructed on site. Most of the mass-burn facilities are erected with boilers to use the combustion heat for the production of energy.
Refuse-derived fuel incinerators:
Refused-derived fuels (RDF) are used for wastes which have been prepossessed to remove non-combustibles and recyclables. The combustibles are shredded into uniform fuel which has a higher heating value. An RDF facility may be equipped for combustion or processing or both.
Modular combustors can accept all kinds of materials without processing. These are smaller than mass burn. These are pre-fabricated and can be assembled on sight easily and quickly.