Low-calorific-value fuel gas and high-temperature air burning furnace with water wall

Abstract

The invention relates to a low-calorific-value fuel gas and high-temperature air burning furnace with a water wall. The low-calorific-value fuel gas and high-temperature air burning furnace with the water wall is characterized by comprising a combustor furnace body and at least two heat accumulation chambers, wherein the heat accumulation chambers are internally provided with heat accumulators, the combustor furnace body is respectively communicated with the two heat accumulation chambers by virtue of corresponding gas passages, and a four-way reversing valve is arranged between two heat accumulation chambers; the gas passages are respectively provided with fuel gas burners, the outer layer of the combustor furnace body is made of a thermal insulation material, the inner layer of the combustor furnace body is provided with the water wall, and the water wall is a membrane-type water wall. The low-calorific-value fuel gas and high-temperature air burning furnace can be applied to a fuel gas and steam combined cycle power generation system; a heat storage type high-temperature air burning technology is adopted, so that oxygen-deficient high-temperature combustion of the low-calorific-value fuel gas in a hearth, high combustion heat efficiency and low emission of pollutants such as NOx are realized. The energy of the low-calorific-value fuel gas and high-temperature air burning furnace can be entirely recycled, the energy is not consumed, the overall heat generating efficiency of the set is obviously improved, and the efficient and comprehensive utilization of the low-calorific-value fuel gas is realized.

Description

technical field [0001] The invention relates to the technical field of low-calorific-value gas regenerative high-temperature air combustion devices, and more specifically relates to a low-calorific-value gas-fired high-temperature air combustion furnace with a water-cooled wall. Background technique [0002] At present, in my country's iron and steel enterprises, by-product gas must first meet the heating needs of steel production, and the gas after meeting the heating needs of production is called surplus gas. During the smelting process, every 1 ton of iron smelted can produce 1300-1400m 3 dry blast furnace gas. Blast furnace gas is a by-product of ironmaking. Its main feature is low calorific value, and its calorific value is generally 2514-4190kJ / Nm 3 , combustion is not stable. With the development of energy-saving technology, the amount of surplus blast furnace gas is also increasing. Comprehensive utilization of these surplus blast furnace gas will be a major prob...

AI Technical Summary

Problems solved by technology

The burners in the existing CCPP technology have single-tube and multi-tube burners, and there are still problems such as low combustion efficiency, high pollutant emissions, and low overall efficiency of CCPP.

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