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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: 2005-08-04
ALEXAKIS THEODORA +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach results in a highly efficient fuel stream that rapidly gasifies at high temperatures, significantly improving combustion efficiency in reactors such as plasma arc waste destruction furnaces.

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

[0015] 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.

[0016] 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.

[0017] Once the waste materials have been reduced a...

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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

FIELD OF THE INVENTION [0001] 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 [0002] 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 centimetres. [0003] Efforts have also been made in the past to convert waste materials, such as waste paper products, into useful forms, including fuel. One such method is disclosed in U.S. Pat. No. 4,123,489 where paper waste is processed by a rotary cutter which...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F23G5/02
CPCF23G5/02F23G2201/20F23G2205/20F23G2201/702F23G2201/80F23G2201/603
Inventor ALEXAKIS, THEODORACOFIELD, JON WILLIAMMANOLIADIS, PLATONNOLTING, EUGENE ELLISTSANTRIZOS, PETER GEORGE
Owner ALEXAKIS THEODORA