Primary air stepped wavy air distribution deslagging device of circulating fluidized bed boiler

Abstract

The invention discloses a primary air stepped wavy air distribution deslagging device of a circulating fluidized bed boiler. The primary air stepped wavy air distribution deslagging device comprises crutch type wind caps, ash buckets and an air bellow. According to the primary air stepped wavy air distribution deslagging device, stepped wavy air distribution plates are adopted to replace the windcaps adopted for a traditional circulating fluidized bed boiler to conduct air distribution. One deslagging ash bucket so arranged below each wave. The air distribution plates are arranged in a sloping form, and the cross sectional area of a deslagging channel is increased, the problem that the traditional circulating fluidized bed boiler is unsmooth in deslagging can be efficiency solved, and theair distribution uniformity is improved. The situation that the combustion efficiency is reduced and even the boiler is blown out urgently due to coking of the air distribution plates and blockage ofa deslagging pipe is avoided. The primary air stepped wavy air distribution deslagging device is particularly suitable for biomass fuel fired or refuse fuel fired circulating fluidized bed boiler. The wind caps are arranged in a stepped mode, and the service life of the wind caps is prolonged. The primary air stepped wavy air distribution deslagging device has the characteristics of improving theair distribution uniformity of a circulating fluidized bed boiler hearth, improving the combustion efficiency and stability, conducing smooth deslagging for the boiler, reducing the bed pressure andthe like, and has a broad application market.

Description

technical field [0001] The invention relates to the field of circulating fluidized bed boilers, in particular to a step-type wave air distribution and slag removal device for primary air of circulating fluidized bed boilers, which is applied to biomass and garbage power generation equipment. Background technique [0002] With the continuous and rapid development of society, the world's demand for energy continues to increase, and fossil fuels can no longer meet the growing energy demand. Therefore, the development of renewable energy has become the focus of attention all over the world. Among them, biomass fuel and waste fuel power generation technologies have been applied on a large scale. [0003] The circulating fluidized bed boiler air distribution device is the key device to ensure the stable combustion of the boiler. Traditional circulating fluidized bed boilers generally use hundreds of column-type hoods as the air distribution device. Because biomass fuel and wast...

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Problems solved by technology

[0005] In order to solve the problem that the slag discharge pipe is easily blocked and the air distribution is uneven when the traditional circulating fluidized bed boiler burns biomass fuel or garbage fuel, the invention provides a step-type wave air distribution and slag discharge device for the primary air of the circulating fluidized bed boiler , which can make the air distribution plate distribute air evenly, discharge slag smoothly, and reduce the resistance of the air distribution plate

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