Charcoal/ash removal system for a downdraft gasifier and associated methods

a gasifier and downdraft technology, applied in the direction of combustible gas chemical modification, combustible gas purification/modification, combustible gas production, etc., can solve the problems of no system currently addressing all of these desirable features, process is not simple extraction and disposal technique,

Inactive Publication Date: 2009-01-08
ENERGY & ENVIRONMENTAL RES CENT FOUNDATIO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]A system of the invention is provided for disengaging gas and removing charcoal and ash in a fixed-bed gasification system including a conveying system configured to be disposed below a gasifier for conveying charco

Problems solved by technology

One problem with many systems, is that the techniques do not provide all of the desirable features of a fixed-bed gasification process.
No system currently addresses all of these desirable features.
Some systems provide examples of wet removal processes that are limited to removal of the solids but do not address gas offtake systems.
However, this process is not a simple extraction and disposal technique, but rather a complicated high-pressure rein

Method used

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  • Charcoal/ash removal system for a downdraft gasifier and associated methods
  • Charcoal/ash removal system for a downdraft gasifier and associated methods
  • Charcoal/ash removal system for a downdraft gasifier and associated methods

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Embodiment Construction

[0017]There is a need for improved techniques for removal of solids from gasifiers, including gas disengagement mechanisms designed to prevent plugging and blinding of gas offtake systems, while simultaneously limiting particulate entrainment in gas produced from the gasifier. It is also desired that such a mechanism also include 1) limited disturbance of the fixed bed, 2) the ability to handle metal objects and ash clinkers, 3) an airtight seal of the gasifier, 4) dust mitigation of the solids discharge, and 5) fire prevention of hot charcoal discharged from the process.

[0018]The present invention provides a simple and effective solution for removal of solids and for gas disengagement from a fixed-bed gasifier. The present invention provides a novel means for removing hot solids from the discharge end of the process, while eliminating plugging and blinding of the exhaust gas manifold and limiting particulate entrainment into the produced gas.

[0019]One example of an apparatus of the...

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Abstract

A method and apparatus is provided for use in a fixed-bed gasification system for the disengagement of gas and the removal of ash and charcoal. In one example, the invention includes an auger system, a water seal system, and a gas disengagement system. The gas disengagement mechanism prevents plugging and blinding of the gas offtake system and simultaneously limits particulate entrainment in the gas produced by the gasifier.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority under 35 U.S.C. § 119 to co-pending, commonly owned U.S. provisional patent application Ser. No. 60 / 947,545, attorney docket number EER.P0036P, filed on Jul. 2, 2007 entitled “CHARCOAL / ASH REMOVAL SYSTEM FOR A DOWNDRAFT GASIFIER”, which is incorporated by reference herein.FIELD OF THE INVENTION[0002]This invention relates to fixed-bed gasification systems. In particular, this invention is drawn to gasification systems that remove charcoal and ash from a fixed bed of solids, and that are simple, robust, and cost-effective.BACKGROUND OF THE INVENTION[0003]Energy conversion devices, such as gasifiers, designed to convert solid fuel to heat and power, are significant to the world's energy infrastructure. A gasifier is operated by limiting the air required for complete combustion in order to primarily produce a low-Btu gas comprised of hydrogen, carbon monoxide, methane, carbon dioxide, and nitrogen. Gasifiers ...

Claims

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Application Information

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IPC IPC(8): C10J3/52
CPCC10J3/26C10J2300/0956C10J3/34
Inventor SCHMIDT, DARREN D.
Owner ENERGY & ENVIRONMENTAL RES CENT FOUNDATIO
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