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Bio-solid materials as alternate fuels in cement kiln, riser duct and calciner

a technology of biosolid materials and cement kilns, which is applied in the direction of biofuels, fuels, waste based fuels, etc., can solve the problem that the largest cost item in the manufacture of cement is the cost of fuel

Inactive Publication Date: 2005-12-15
LEHIGH CEMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0029] A major benefit from the present invention resides in the ability to avoid landfill disposal of bio-solid materials that will decay and generate methane a known and unwanted atmospheric “Greenhouse Gas”.

Problems solved by technology

One of the largest cost items in the manufacture of cement is the cost of fuel.

Method used

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  • Bio-solid materials as alternate fuels in cement kiln, riser duct and calciner
  • Bio-solid materials as alternate fuels in cement kiln, riser duct and calciner
  • Bio-solid materials as alternate fuels in cement kiln, riser duct and calciner

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Embodiment Construction

[0038] Waste materials are defined as residual by-products from municipal activities, farming or food processing, wood and paper processing and / or manufacture, and industrial processes.

[0039] Table 1 sets forth general categories of waste materials that would be usable in the method and apparatus of the present invention.

TABLE 1Fuel % / Ash %Critical AshMaterialSolid % / Liquid %(Dry)Fuel BTU's / lb (Dry)ComponentsMunicipal Waste85 / 1570 / 305,000-8,000P2O5, ClWood Waste80 / 2070 / 305,000-8,000Na2O, K2OIndustrial Waste80 / 2050 / 505,000-8,000variesFood Processing80 / 2050 / 505,000-8,000variesWasteAgricultural Waste80 / 2050 / 505,000-8,000varies

[0040] Example of Municipal waste are refuse derived fuel, waste water treatment sludge, grease, scum and screenings.

[0041] Examples of wood waste are bark, hardwoods, railroad ties, saw dust, softwoods, woodex pellets, board plant waste, planer shavings, sander dust, slash, urban wood waste, zinc borate and OSB waste.

[0042] Examples of Industrial waste are a...

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Abstract

Alternate fuels and method of using the alternate fuels for replacing all or part of conventional fuels used to heat a riser duct, calciner or kiln in a cement making process.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This Application is a Continuation-in-Part of U.S. patent application Ser. No. 10 / 866,999 filed Jun. 14, 2004.BACKGROUND OF THE INVENTION [0002] The present invention pertains to use of bio-solid materials as a fuel or fuel additive in a cement making process. In particular, the present invention pertains to bio-solid materials as an alternate fuel in a cement kiln, riser duct and calciner. Bio-solids can be mixed with mineral by-products and introduced into the riser duct or calciner in the cement making process. [0003] Bio-solids are defined as a residual by-product from biological activity or the residual by-products from processing of biological materials. Materials that are of interest for use in the method and apparatus of the present invention include sewage sludge, paper pulp residue, industrial sludge, food processing sludge and agricultural waste sludge. [0004] Mineral or industrial by-products are defined as having some heat ...

Claims

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Application Information

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IPC IPC(8): C10L5/00C10L5/44
CPCC10L5/44Y02E50/10Y02E50/30C10L2250/06C10L2290/02C10L2290/06C10L5/403C10L5/42C10L5/442C10L5/46C10L5/48C10L2290/08
Inventor MORTON, EDWARD L.NOBIS, RAINERALESI, SHANE
Owner LEHIGH CEMENT
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