Conversion of waste into highly efficient fuel

a technology of highly efficient fuel and waste, which is applied in the direction of solid fuel combustion, combustion types, lighting and heating apparatus, etc., can solve the problems that the pellets, however, do not constitute very efficient fuels, and achieve the effect of increasing combustion efficiency

Inactive Publication Date: 2009-11-26
PYROGENESIS CANADA INC
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  • Abstract
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Benefits of technology

[0007]It is a further object to provide a solid fuel stream from such waste, which will easily burn in a plasma furnace or other combustion reactor or incinerator.
[0011]Such particles, which usually have a diameter of 15 μm or less, are fed pneumatically to a desired type of combustion reactor without any intermediate transformation into pellets or the like. This direct conveying of the fine particles into a combustion reactor, such as an incinerator or a waste treatment furnace, or a high-efficiency plasma-fired eductor of a plasma arc waste destruction system, allows them to gasify rapidly when exposed to the high heat of the reactor (about 1000° C. or higher), thus significantly increasing combustion efficiency.

Problems solved by technology

Such pellets, however, do not constitute a very efficient fuel since their surface to mass ratio is not very high.

Method used

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  • Conversion of waste into highly efficient fuel
  • Conversion of waste into highly efficient fuel
  • Conversion of waste into highly efficient fuel

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Embodiment Construction

[0017]A preferred embodiment of the invention is illustrated in FIG. 1. According to this embodiment, waste can be subjected at 10 to pulping followed by water removal and / or at 12 to shredding followed by metal extraction. Pulping, mainly of food waste, is carried out in a pulper where the size of the particles is reduced to a size suitable for milling into fine particles, which is usually to less than ½ cm. Following the pulper, water is removed to yield an extracted pulped product containing a predetermined amount of solids, e.g. approximately 50% solids, by weight.

[0018]Mixed waste, including paper, cardboard, food, plastic, wood and textile wastes, is subjected at 12 to size reduction and extraction of any metal that may be present in such waste. This can be done, for instance, in a shredder where the size of such waste is reduced to small pieces suitable for milling into fine particles, for example of about 2.5 cm in size.

[0019]Once the waste materials have bees reduced at 10 ...

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Abstract

Solid combustible waste materials are converted into highly efficient fuel by subjecting such materials to size reduction in suitable size-reducing equipment. The last piece of the equipment is a mill which pulverizes the waste materials into fine particles having a high surface to mass ratio and forming a highly efficient fuel when these particles are directly injected into a combustion reactor operating at high temperature.

Description

PRIOR APPLICATIONS[0001]This application is a continuation of U.S. application Ser. No. 11 / 092,323 filed Mar. 28, 2005, which is a continuation of U.S. application Ser. No. 10 / 259,547 filed Sep. 27, 2002, now U.S. Pat. No. 6,871,604 issued Mar. 29, 2005.FIELD OF THE INVENTION[0002]This invention relates to a method and an apparatus for converting solid combustible waste materials, such as paper, cardboard, food, plastics, textiles, wood and the like, into fine particles which form a highly efficient fuel when fed directly into a combustion reactor, particularly such as a plasma arc waste destruction furnace.BACKGROUND OF THE INVENTION[0003]Typically, combustible solid waste is introduced into a thermal treatment furnace, such as an incinerator, in its original form or after being reduced in size by a shredder-type device. The moisture content of the waste particles is usually “as-received” and the smallest practical size achieved by a conventional shredder is several centimeters.[00...

Claims

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Application Information

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IPC IPC(8): F23G5/033
CPCF23G5/027F23G5/033F23G7/12F23G2201/20F23G2201/60F23G2209/22F23G2201/80F23G2204/201F23G2205/20F23G2209/12F23G2201/702
InventorALEXAKIS, THEODORACOFIELD, JON WILLIAMMANOLIADIS, PLATONNOLTING, EUGENE ELLISTSANTRIZOS, PETER GEORGE
OwnerPYROGENESIS CANADA INC