Combustion device for multi-fuel premixed swirl combustion

Abstract

The invention relates to a combustion device for multi-fuel premix swirl-flow combustion. Even mixing of airflow classification, reasonable distribution of a premix airflow field and even distribution of a flue gas field are effectively completed, a coal powder or oil steam inlet pipe is arranged in a gas inlet pipe at the combustion device barrel closed end, an air swirl-flow loop is formed between a combustion device barrel body and the gas inlet pipe, a gas outlet is formed in the inner end of the gas inlet pipe, a cone-shaped blunt body is arranged on the gas outlet, an air inlet pipe is arranged on the combustion device barrel side wall and communicated with the air swirl-flow loop, the air swirl-flow loop is communicated with a premix combustion passage which is arranged in the opening end of the combustion device barrel body, an air outlet is formed between the air swirl-flow loop and the gas outlet, and an oxygen-enriched air inlet pipe is arranged in the coal powder or oil steam inlet pipe. According to the combustion device for the multi-fuel premix swirl-flow combustion, rapid and even mixing of an industrial furnace combustion device and oxygen-enriched combustion-assistance high-temperature preheating combustion are effectively achieved, and the combustion intensity and the stability of the combustion are effectively improved.

Description

technical field [0001] The invention relates to heat utilization equipment of industrial furnaces and kilns, and is especially suitable for a multi-fuel premixed swirling combustion combustion device used for boilers burning gas fuels and heating furnaces (or hot blast stoves). Background technique [0002] At present, from the perspective of energy saving and consumption reduction, industrial furnaces and kilns require high temperature, uniform temperature, and uniform flow performance and structural stability under the combustion of different fuels and different gases, so as to finally achieve the goals of high efficiency, energy saving, environmental protection, and increased production. For this reason, in addition to the optimized combustion process, the burner in the industrial furnace should also be able to adapt to the diversification of fuel types, such as burning oil, burning coal, and burning various gases. Oxygen-enriched combustion is used. This involves the st...

AI Technical Summary

Problems solved by technology

Throughout the current use of burners in various industrial furnaces, there are always various structural problems, which will inevitably lead to uneven mixing and incomplete combustion between gas (or oil vapor, or coal powder) and air.

In addition, when the position of the burner and the combustion chamber space are inappropriate, there will be problems such as uncertain characteristics of the air flow field in the combustion chamber, uneven air distribution, and low combustion intensity.

Such a burner and its matching combustion chamber structure are difficult to achieve ideal thermal effects even when oxygen-enriched combustion is used.

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