Local oxygen-enriched combustion transformation system for conventional circulating fluidized bed boiler with external bed

A circulating fluidized bed, oxygen-enriched combustion technology, applied in fluidized bed combustion equipment, fuels burned in a molten state, combustion methods, etc., can solve problems such as increased power generation costs, reduced power station efficiency, and reduced flue gas emissions. , the effect of improving combustion efficiency and reducing emissions

Inactive Publication Date: 2013-02-13
LIAONING ELECTRIC POWER COMPANY LIMITED POWER SCI RES INSTION +3
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  • Abstract
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Problems solved by technology

[0004] CO reduction during electricity production 2 Emissions and realization of CO 2 The premise of separation is to obtain high CO 2 Concentration of flue gas, while CO in conventional coal-fired power plant boiler exhaust 2 The concentra

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  • Local oxygen-enriched combustion transformation system for conventional circulating fluidized bed boiler with external bed

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Embodiment

[0020] Such as figure 1 As shown, the present invention is a partial oxygen-enriched combustion transformation system for a conventional circulating fluidized bed boiler with an external bed. The reformed part is the secondary air 8, that is, the secondary air 8 adopts local oxygen-enriched combustion, while the primary air 9, the fluidized air 7 of the return feeder and the fluidized air 6 of the external bed still adopt conventional air combustion to avoid In the state of oxygen combustion, due to the increase of oxygen concentration, the required air flow rate decreases, resulting in insufficient fluidization power of the furnace 1, the feeder 3 or the external bed 5. The system composition after the boiler transformation is: the furnace 1 of the circulating fluidized bed boiler, the cyclone separator 2 and the rear heating surface 14 are connected in sequence, and the rear heating surface 14, the air preheater 15, the flue gas purification device 16 and the chimney 17 are ...

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Abstract

The invention relates to a local oxygen-enriched combustion transformation system for a conventional circulating fluidized bed boiler with an external bed. In the transformed system, secondary air is subjected to local oxygen-enriched combustion, while primary air, fluidizing air of a return feeder and fluidizing air of the external bed is still subjected to conventional air combustion. With the adoption of the transformation system, the combustion efficiency of the boiler can be improved, the heat loss of smoke vent is reduced, and the discharge amount of smoke pollutants, flow of air and smoke, output forces of a secondary air fan and an induced fan, and electrical load of a plant are reduced. The CO2 concentration in the flue gas is increased, the recovery cost of CO2 in industrial practices is lowered, and a solid foundation is laid for the whole oxygen-enriched combustion of the circulating fluidized bed boiler.

Description

technical field [0001] The invention relates to a partial oxygen-enriched combustion transformation system of a conventional circulating fluidized bed boiler, in particular to a local oxygen-enriched combustion transformation system of a conventional circulating fluidized bed boiler with an external bed, belonging to the technical field of power plant boilers. Background technique [0002] CO 2 It is mainly produced in the combustion process of fossil fuels. With the rapid development of society and economy, the demand for energy continues to increase, and the combustion and utilization of fossil fuels are also increasing, which leads to CO 2 Emissions are also increasing. At present, my country is the second largest CO in the world after the United States. 2 emitter country. my country is one of the few countries in the world where primary energy consumption is dominated by coal. With the rapid development of the economy and the continued growth of the population, my cou...

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Application Information

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IPC IPC(8): F23C10/18F23L7/00
CPCY02E20/34
Inventor 曾光黄润泽张戟
Owner LIAONING ELECTRIC POWER COMPANY LIMITED POWER SCI RES INSTION
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