Low-nitrogen combustion device and combustion boiler

Abstract

The invention discloses a low-nitrogen combustion device and a combustion boiler and belongs to the technical field of low-nitrogen combustion components. The low-nitrogen combustion device comprisesa main air duct, a central air duct and a plurality of gas spray guns. An air outlet is formed in one end of the main air duct. A central gas pipe is arranged in the main air duct and is coaxial withthe main air duct. A flame stabilizing mechanism is arranged on the central gas pipe. The central air duct is arranged on the central gas pipe in a sleeving mode and located outside the air outlet. The flame stabilizing mechanism is located in an inner cavity of the central air duct. The end, provided with a gas outlet, of the central gas pipe stretches out of the central air duct. The multiple gas spray guns are arranged around the central air duct. In the axis direction of the main air duct, the distance between gas sprayers of the gas spray guns and the end surface of the end, provided withthe air outlet, of the main air duct is greater than that between the side, away from the gas outlet, of the flame stabilizing mechanism and the end surface. Gas combustion is started outside the airoutlet, the inner cavity of the main air duct produces no flame, gas combustion heat can be dissipated into a boiler hearth in time, the flame peak temperature is decreased, and produced thermal NOxis reduced.

Description

technical field [0001] The invention relates to the technical field of low-nitrogen combustion components, in particular to a low-nitrogen combustion device and a combustion boiler. Background technique [0002] With the advancement of social science and technology and the enhancement of people's awareness of environmental protection, more and more attention has been paid to the problem of environmental pollution caused by exhaust gas emitted by industrial gas-fired boilers. In recent years, the industry has focused on the introduction of flue gas recirculation technology into the combustion system of high calorific value industrial gas boilers, which can not only reduce the high temperature peak in the combustion area, but also reduce the oxygen content of the gas in the combustion area, thereby effectively reducing thermal and fuel NOx A consensus has been reached on the positive technical effect of the production volume, and the combination of low-nitrogen burners and flu...

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Problems solved by technology

[0004] The object of the present invention is to provide a low-nitrogen combustion device and a combustion boiler to solve the problem that the heat existing in the low-nitrogen combustion device in the prior art is concentrated in the mouth of the throat and cannot be released in time, resulting in the formation of local high-temperature points that are prone to NOx generation, so that The problem of increased NOx generation

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