Oxygen-enriched combustion boiler system with dehydration adjusting performance

Abstract

The invention discloses an oxygen-enriched combustion boiler system with a dehydration adjusting performance. After flue gas that is discharged from a boiler body is processed by a dedusting device and a desulfurizing device, the flue gas is divided into two parts. One part is introduced into a dehydration device through a dehydration inlet flue, and the other part goes through a dehydration adjusting flue. The flue gas, which has been dehydrated by the dehydration device, is divided into two parts. One part is introduced into a CO2 processing apparatus after going through a post-dehydration smoke discharge flue, and the other part is mixed with the flue gas from the dehydration adjusting flue after going through a post-dehydration recirculation flue. The mixed flue gas is divided into three parts; one part is introduced into a gas preheater and heated, the second part is introduced into a temperature adjusting air channel, and the third part is introduced into a powder production facility after going through a sealed air channel and a sealed blower fan. The performance of the boiler system on adjusting the dehydration amount is greatly enhanced, and the performance of the boiler system on adapting to the fluctuation of coal quality or change of coal species under an oxygen-enriched combustion condition is obviously enhanced.

Description

technical field [0001] The invention relates to an oxygen-enriched combustion boiler system with dehydration adjustment capability, and belongs to the technical field of boiler systems. Background technique [0002] CO in coal-based electricity production 2 Emissions of CO from all human activities 2 About 25% of total emissions are CO 2 Largest single point source of emissions. CO in the exhaust gas of air-supported combustion of conventional pulverized coal boiler 2 The concentration is only 13% to 15%, which gives CO 2 The separation and capture of these materials bring great technical and economical problems. Oxygen-enriched combustion technology, also known as O 2 / CO 2 Combustion technology for organizing pulverized coal in O 2 and CO 2 Combustion in the mixed gas can greatly improve the CO in exhaust smoke 2 concentration (CO after dehydration 2 The concentration can reach more than 95%), which greatly simplifies the CO 2 recovery cost and difficulty. N ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to provide an oxygen-enriched combustion boiler system with dehydration adjustment ability that increases the boiler's adaptability to coal quality fluctuations or coal type changes under oxygen-enriched combustion conditions, and solves how to make oxygen-enriched combustion Problems with wide dehydration regulation capabilities for fired boiler systems

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