Gas-fired boiler flue gas recirculation low-nitrogen combustion device

Abstract

The invention discloses a gas-fired boiler flue gas recirculation low-nitrogen combustion device which comprises a boiler main body. The bottom of the boiler main body is provided with a combustor which comprises a main combustion chamber. The other side of the main combustion chamber is connected with a circulation pipeline. A flow adjusting valve is arranged inside the circulation pipeline, a recombustion chamber is connected with the main combustion chamber through the circulation pipeline, the tops of the main combustion chamber and the recombustion chamber are provided with a complete combustion chamber, one side of the complete combustion chamber is connected with a third air blower, a partition plate is arranged between the complete combustion chamber and the main combustion chamber, a partition plate is arranged between the complete combustion chamber and the recombustion chamber, circulation holes are formed in the partition plates, the top of the complete combustion chamber is provided with a flue gas purifying device, and the glue gas purifying device is connected with a flue gas exhaust device through an induced draft fan. A large amount of reducing gas is generated inthe main combustion chamber and introduced into the recombustion chamber through the circulation pipeline, nitrogen oxide is reduced to nitrogen, emission standards are met, and the purpose of low-nitrogen combustion is achieved.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a gas-fired boiler flue gas recirculation low-nitrogen combustion device. Background technique [0002] With the rapid development of social economy, the pace of people's production and life is accelerating, and the emissions of industrial and mining enterprises and motor vehicle exhaust are increasing, causing serious air pollution, so smog and other phenomena often appear. The deterioration of air quality is mainly due to the large amount of pollutants entering the atmosphere, which exceeds the self-purification capacity of the natural environment. After long-term accumulation, the air quality is getting worse and worse. We humans live in this environment, and the atmosphere is polluted. It is a serious threat to our health; and the main cause of air pollution is the irregular discharge of some industrial smoke. The high content of air pollutants in the smoke has caused serious...

AI Technical Summary

Problems solved by technology

When the boiler burns fuel, it will produce a large amount of flue gas. If the flue gas emission is not treated, it will bring serious pollution to the atmosphere. At present, the country has strict restrictions on the emission of boiler flue gas pollutants.

The main pollutants of boiler flue gas are nitrogen oxides, soot and heavy metals, etc. Among them, nitrogen oxides will lower the pH of the air and form acid rain, which will cause serious environmental pollution and affect people's production and life.

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