A burner capable of rapidly realizing flameless combustion

Abstract

The invention relates to a combustor capable of quickly realizing flameless combustion. The combustor comprises a center fuel gas spraying pipe, a loop fuel gas spraying pipe coaxially sealed outside the center fuel gas spraying pipe, two symmetric air spraying pipes symmetrically arranged at the two sides of the loop fuel gas spraying pipe in parallel, a loop air spraying pipe arranged outside the loop fuel gas spraying pipe and the symmetric air spraying pipe, and a flame stabilizing blunt body, wherein the loop air spraying pipe and the loop fuel gas spraying pipe are coaxially arranged; the flame stabilizing blunt body is detachably connected to the front ends of the center fuel gas spraying pipe and the loop fuel gas spraying pipe, and is provided with a center fuel gas nozzle communicated with the center fuel gas spraying pipe, more than two peripheral fuel gas nozzles positioned around the center fuel gas nozzle and communicated with the loop fuel gas spraying pipe and two air nozzles symmetrically arranged at the two sides of the center fuel gas nozzle; the two air nozzles are communicated with the two symmetric air spraying pipes; an annular projection is arranged at the front end of the flame stabilizing blunt body; the outer diameter of the annular projection is equal to the inner diameter of the loop air spraying pipe; and a distance is left between the annular projection and the front end of the loop air spraying pipe.

Description

technical field [0001] The invention relates to a burner, in particular to a burner capable of quickly realizing flameless combustion. Background technique [0002] Flameless combustion (MILD combustion, Flameless combustion) is a new type of clean combustion technology. This technology is realized by controlling the rapid mixing of fuel, oxidant and high-temperature flue gas in a furnace with low oxygen concentration and temperature higher than the self-ignition point of fuel. Compared with traditional combustion methods, flameless combustion has no visible flame front, and the temperature and brightness of the entire furnace are uniform, avoiding a large amount of NO x At the same time, the efficiency of thermal radiation and heat exchange is improved, and the combustion is stable and the noise is extremely low. It is regarded as one of the most potential clean combustion technologies by the international combustion community. At present, air pollution is becoming more a...

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Problems solved by technology

However, due to the lack of a flame stabilizing device, the invention cannot heat at the rated power during the preheating furnace stage, and can only gradually increase the flow of gas and air to avoid the flameout problem by gradually heating

Due to the partial premixing method in the preheating furnace stage, there will be hidden dangers of tempering and explosion

At the same time, in the flameless combustion stage, the invention uses the diagonal flow air to increase the meeting time of air and gas to achieve flameless combustion, but the high-speed diagonal flow air will scour the furnace wall, and long-term operation may cause erosion damage to the furnace

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