Hydrogen-vapor oxygen-rich flameless burner

Abstract

The invention belongs to the field of flameless burners, and particularly discloses a hydrogen-vapor oxygen-rich flameless burner. A hydrogen spraying pipe is connected with a burning chamber. A firstvapor spraying pipe sleeves the outer side of the hydrogen spraying pipe and is connected with the burning chamber and used for spraying vapor to the burning chamber at the preheating stage. A primary air spraying pipe sleeves the outer side of the first vapor spraying pipe and is connected with the burning chamber and used for spraying primary air to the burning chamber at the preheating stage.A secondary air spraying pipe is connected with the burning chamber and used for spraying secondary air to the burning chamber at the flameless burning stage. The burning chamber is used for providingspace for oxygen-rich burning of the hydrogen. According to the hydrogen-vapor oxygen-rich flameless burner, the primary air and the hydrogen are separated through the vapor, the burning rate of thehydrogen can be effectively reduced, and therefore the safety of the burner is improved; after the preset temperature is reached, the secondary air spraying pipe is switched to provide the oxygen to achieve flameless burning of the hydrogen, and it can be guaranteed that the temperature in the burner is evenly distributed; and therefore potential safety hazards generated by hydrogen burning are avoided.

Description

technical field [0001] The invention belongs to the field of flameless burners, and more specifically relates to a hydrogen-water vapor oxygen-enriched flameless burner. Background technique [0002] In recent years, with the rapid consumption of fossil energy by human beings, environmental problems have become increasingly serious. Nitrogen oxides produced by fossil energy combustion are one of the main causes of acid rain and PM2.5. At the same time, CO produced by fossil fuel combustion 2 It will also exacerbate the greenhouse gas effect and have a great impact on the environment. As a new type of fuel, hydrogen has attracted much attention due to its many advantages. For example, because hydrogen has a high combustion calorific value, the energy generated by burning hydrogen is relatively high; the product after hydrogen combustion is only water, so hydrogen combustion is clean and pollution-free. ; In addition, hydrogen can be obtained directly from water and can be re...

AI Technical Summary

Problems solved by technology

However, hydrogen combustion also has insurmountable disadvantages: the high calorific value of hydrogen, and the corresponding high combustion temperature, resulting in high emissions of nitrogen oxides (NOx) accompanying hydrogen combustion; the combustion rate of hydrogen is extremely fast and easy to explode, so The safety hazard of hydrogen combustion also limits the large-scale use of hydrogen

However, the existing oxygen-enriched burners all use carbon dioxide as the oxidant diluent, while using water vapor as the diluent for hydrogen fuel can obtain high-purity water vapor flue gas, which is beneficial to trapping water in the flue gas and reducing NOx formation; at the same time , for hydrogen, a fuel with an extremely fast combustion rate, there is currently no invention patent for a flameless burner, which limits the utilization of hydrogen, a clean energy.

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