Low-nitrogen fluidized bed combustor for biomass

Abstract

The invention discloses a low-nitrogen fluidized bed combustor for biomass. A feed opening and a flame nozzle are formed in the side wall of an inner chamber of a furnace body, and an air distribution plate and a partition wall are arranged at the bottom of the inner chamber. The inner chamber is divided into a combustion chamber and a flue through the partition wall, the combustion chamber is used as a combustion area, and the flue is used for settling solid particles. The upper part of the combustion chamber is communicated with a flue inlet, a through hole is formed in the bottom of the partition wall, and the combustion chamber is communicated with the flue. According to the inner chamber structure with the air distribution plate, the flue and the through hole, when flue gas passes through the flue, solid bodies in the flue gas settles under the action of dead weight, and precipitates are circulated to the combustion chamber for combusting utilization through the through hole. The combustion mode of a circulating fluidized bed is realized, the combustion efficiency is high, and the effective effects of sufficient combustion without coking and effective settling without ash deposition are realized.

Description

technical field [0001] The invention belongs to the technical field of combustion equipment, in particular to a fluidized bed combustion machine which burns biomass fuel and adopts low-nitrogen combustion. Background technique [0002] At present, coal-fired or oil-fired burners are generally used to provide heat for boilers. With the wide application of biomass fuel, the application of biomass fuel combustion equipment has been highly valued. [0003] As we all know, due to the high volatile content of biomass fuel and easy slagging, it brings great challenges to the structural design of biomass burners. There are problems that need to be improved urgently in the existing biomass burner, including: [0004] 1. From the perspective of combustion method, because biomass fuel is cheaper than oil and gas fuel, similar biomass burners fail to solve the problems of coking and emissions. Existing biomass fuel burners adopt slow direct combustion technology, such as CN202056861U...

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Problems solved by technology

[0007] In order to solve the disadvantages of the existing boiler burner such as unreasonable structure of the combustion chamber, low combustion efficiency, insufficient combustion, need for external denitrification components, difficulty in ash removal, and unreasonable fire distribution and air distribution, the present invention provides a Fluidized bed function, effective ash removal, low nitrogen fluidized bed burner with high combustion efficiency

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