Combustion method of micro-fluidization grate-fired boiler

Abstract

The invention relates to the technical field of boiler combustion, and discloses a combustion method of a micro-fluidization grate-fired boiler. The combustion method comprises the steps that air is supplied into a hearth from the bottom of the hearth of the boiler; and by adjusting the air supply volume, part of fuel in the hearth is combusted in a fluidized suspension state. According to the combustion method of the micro-fluidization grate-fired boiler, a flow field and wind power distribution of combustion equipment are improved, so that the grate-fired air quantity is provided, and the fluidization combustion power is also provided; due to the fact that large fuel particles are in a micro-suspension grate-fired state and small fuel particles are in a fluidized combustion state, the combustion speed is greatly increased, heat load distribution in the hearth is improved, and efficient combustion, enhanced heat transfer and low-nitrogen generation are achieved; due to the fact that small-particle fuel is reduced in the grate-firing process, the problem that the combustion speed is affected due to the fact that CO2 is retained between coal seams in traditional grate firing is solved, the grate-firing efficiency is improved, and the carbon content of ash is reduced; and meanwhile, the energy consumption is reduced by more than 50% even though fluidized combustion is also adopted.

Description

technical field [0001] The invention relates to the technical field of boiler combustion, in particular to a combustion method for a microfluidized layer-fired boiler. Background technique [0002] my country is a developing country that uses coal as its main energy source. Coal resources account for about 75% of my country's total energy production and consumption. During the combustion of coal, a large number of pollutants will be produced, among which nitrogen oxides (NO X ) is extremely harmful to the environment. In addition to forming acid rain and destroying the ecological environment, nitrogen oxides can also form photochemical smog that endangers human health. High temperature combustion of coal is NO X One of the main sources of coal-fired boilers, while my country's boilers are mainly coal-fired, so reduce the NO of coal-fired boilers X emissions are of great significance. [0003] Moreover, when the traditional layer-fired boiler adopts the layer-fired method...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a microfluidized layer-fired boiler combustion method, which is used to solve or partially solve the problem that the traditional layer-fired combustion has a long embers stroke, and the fuel is stacked on the grate and there is insufficient combustion, which affects the combustion efficiency and increases the combustion efficiency. The problem of pollutant discharge

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