Coal-burning boiler coupling biomass fuel gas combustion device and combustion system arrangement method using same

Abstract

The invention provides a coal-burning boiler coupling biomass fuel gas combustion device and a combustion system arrangement method using the coal-burning boiler coupling biomass fuel gas combustion device, and belongs to the technical field of boiler combustion devices and the combustion system arrangement methods of the coal-burning boiler coupling biomass fuel gas combustion devices. A biomassfuel gas combustion device is arranged inside a bellow. A central ventilator is fixed inside a fuel gas channel. The central ventilator and the fuel gas channel are concentrically arranged. A secondary air duct is fixed on the outside of the back end of the fuel gas channel. The secondary air duct and the fuel gas channel are concentrically arranged. A secondary wind swirl device is fixed on an air inlet end of the secondary air duct. A central wind swirl device is installed at the back end inside the central ventilator. A fuel gas swirl device is arranged between the back end of the fuel gaschannel and the back end of the central ventilator. A central wind inlet channel is fixed in the center of the fuel gas channel in forward and backward direction and communicates with the central ventilator. According to the combustion system arrangement method using the coal-burning boiler coupling biomass fuel gas combustion device, the biomass fuel gas combustion device is arranged between an upper pulverized coal burner and an OFA burner.

Description

technical field [0001] The invention relates to a coal-fired boiler coupling biomass gas combustion device and a combustion system arrangement method thereof, and belongs to the technical field of a boiler combustion device and a combustion system arrangement method thereof. Background technique [0002] In the biomass gasification coupled coal-fired unit power generation system, due to the change of the type of biomass fuel and the operating conditions of the gasifier itself, the composition of the gas produced by the gasifier is unstable, the calorific value fluctuates greatly, and a large amount of low calorific value gas is injected After entering the furnace, if the combustion conditions are unfavorable, it may have a great impact on the combustion aerodynamic field in the furnace, which in turn affects the burnout of fuel, the emission of nitrogen oxides and the efficiency of the boiler. At present, the existing biomass gas burners are mainly designed for biomass gas w...

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Problems solved by technology

[0002] In the biomass gasification coupled coal-fired unit power generation system, due to the change of the type of biomass fuel and the operating conditions of the gasifier itself, the composition of the gas produced by the gasifier is unstable, the calorific value fluctuates greatly, and a large amount of low calorific value gas is injected After entering the furnace, if the combustion conditions are unfavorable, it may have a great impact on the combustion aerodynamic field in the furnace, which in turn affects the burnout of fuel, the emission of nitrogen oxides and the efficiency of the boiler

At present, the existing biomass gas burners are mainly designed for biomass gas with stable gas composition and fixed calorific value. Most of them have complex structures and are mostly used for gas furnaces that purely burn biomass gas. Generally, they do not have low-nitrogen capabilities.

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