Oxygen-enriched and combustion-supporting device suitable for low calorific value fuel gas

Abstract

The invention relates to an oxygen-enriched and combustion-supporting device suitable for low calorific value fuel gas, which mainly comprises a combustion-supporting gas pipeline, a fuel gas pipeline, a burner nozzle and a combustion passage, wherein a baffle plate is fixed inside the combustion-supporting gas pipeline, the combustion-supporting gas pipeline is divided into a straight flow pipeline and a rotational flow pipeline, and a combustion-supporting swirler is arranged in the rotational flow pipeline; and the straight flow pipeline, the rotational flow pipeline and the fuel gas pipeline are respectively communicated with the combustion passage through the burner nozzle. The oxygen-enriched and combustion-supporting device suitable for the low calorific value fuel gas can be suitable for the oxygen-enriched combustion of low calorific value coal gas, can satisfy the use requirements on various working conditions without exchanging the burner nozzle under conditions that the fuel gas calorific value and the oxygen-enriched concentration of combustion-supporting air fluctuate singly or doubly in a larger range, realizes the complete combustion of low air-fuel ratio, finally achieves the purpose of saving energy and reducing emission and overcomes the defect of the traditional combustion device.

Description

technical field [0001] The invention relates to a combustion-supporting device for an industrial furnace, in particular to an oxygen-enriched combustion-supporting device suitable for low calorific value gas. Background technique [0002] The use of oxygen-enriched combustion in industrial furnaces is internationally recognized as an effective energy-saving and emission-reduction measure. But at present, most of the industrial furnaces in our country use air for combustion, and its disadvantage is that it requires high calorific value of gas and consumes a large amount of coke oven gas with high utilization value. This is because: if the calorific value of the gas is low, the theoretical combustion temperature of the gas is low, and the production demand cannot be guaranteed. Therefore, in order to increase the theoretical combustion temperature of air-assisted combustion, it is necessary to adopt air, gas, or air and gas double preheating technology, and the calorific valu...

AI Technical Summary

Problems solved by technology

Especially the mixed gas commonly used in metallurgical enterprises, its calorific value will fluctuate with the change of the mixing ratio and calorific value of blast furnace gas and coke oven gas. The burner cannot meet the requirements of use at all

[0005] This shows that above-mentioned existing combustion device obviously still has inconvenience and defect in structure and use, and urgently needs to be further improved

Images