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Oxygen fired steam generator

A steam generator, pure oxygen technology, applied in the direction of combustion method, combustion type, combustion equipment, etc., can solve problems such as increasing cost and complexity, increasing auxiliary power demand, etc.

Inactive Publication Date: 2012-05-09
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High velocity dry gas reinjection adds considerable cost and complexity and increases auxiliary power requirements

Method used

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  • Oxygen fired steam generator
  • Oxygen fired steam generator
  • Oxygen fired steam generator

Examples

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Embodiment Construction

[0012] like figure 1 As shown, the transport reactor generally indicated by the numeral 10 operates as a combustor and defines an inlet 12 and an outlet 14 . A solid fuel 64, such as but not limited to coal, is fed to the transport reactor. Substantially all of the transport gas is provided by conduits 16 and 48 when transport reactor 10 is operating at or above a specified system load. The particular system load is defined by the situation when all or substantially all of the transport gas is provided by conduits 16 and 48 at the minimum flow rate for operating the transport reactor 10 . The minimum flow rate is defined by the design and parameters of the transfer reactor and solid fuel, such as the size of the transfer reactor and solid fuel. A portion or substantially all of the transport gas may be heated in an oxygen preheater 18 (explained in the detailed description below) before being supplied to the combustor. The combustion chamber outlet 14 is connected to the in...

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Abstract

In a method for operating a steam generator, a transport reactor is provided. Only a substantially pure oxygen feed stream is introduced into the transport reactor in an amount sufficient to maintain the transport reactor at or above a specific system load. The specific load is the system load when only the substantially pure oxygen feed stream is provided to the transport reactor at a minimum flow velocity for operating the transport reactor. A fuel is combusted in the presence of the substantially pure oxygen feed stream to produce a flue gas, which contains solid material. The solid material is separated from the flue gas and passed to a heat exchanger. The heat exchange may be one of a moving bed heat exchanger or a fluidized bed heat exchanger. The solid material is directed to the transport reactor to contribute to the combustion process.

Description

technical field [0001] The present invention relates generally to steam generators, and more particularly to steam generators in which substantially pure oxygen is injected into a transport reactor. Background technique [0002] Steam generators, especially coal-fired types, produce harmful emissions. Current research focuses on oxy-combustion, which produces a substantially pure carbon dioxide product gas that can be more efficiently separated due to the elimination of the inherent nitrogen present in air combustion. Most oxy-fired steam generators utilize efficient dry gas reinjection to generate the required header flow through the steam generator to support the heat transfer process. High velocity dry gas reinjection adds considerable cost and complexity, and increases auxiliary power requirements. [0003] Pulverized coal steam generators rely on the furnace area for controlled heat transfer. These systems also inherently require substantial dry gas reinjection to ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/10F23L7/00
CPCF23C10/10Y02E20/344F23L7/007F23C2206/103Y02E20/34F23L7/00
Inventor 乔治·D·迈克尔雷斯特约翰·H·基乌
Owner GENERAL ELECTRIC TECH GMBH
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