A heating furnace pure oxygen combustion and carbon dioxide capture system and process

Abstract

The invention discloses a pure oxygen combustion and carbon dioxide capturing system of a heating furnace. The system comprises a liquid oxygen storage slot (1), a vaporizer (2), the heating furnace (5), a waste heat recycling device and a carbon dioxide recycling device; liquid oxygen from the liquid oxygen storage slot (1) is in heat exchange with a refrigerant in the vaporizer (2), and generated oxygen is conveyed into the heating furnace (5); high-calorific-value fuel gas in the heating furnace and the oxygen from the vaporizer (2) are combusted in a pure oxygen combustor (4), and generated smoke gas is exhausted into a heating furnace flue; the waste heat recycling device is arranged in the heating furnace flue and used for recycling heat in the smoke gas; the carbon oxide recycling device is arranged in the heating furnace flue; and the low-temperature refrigerant output by the vaporizer (2) is utilized to cool the smoke gas to recycle carbon dioxide in the smoke gas. The invention further discloses a pure oxygen combustion and carbon dioxide capturing process of the heating furnace. According to the pure oxygen combustion and carbon dioxide capturing system and process of the heating furnace, noise pollution of a combustion fan is reduced, and reducing emission of NOx is realized, so that CO2 capturing cost is greatly reduced.

Description

technical field [0001] The invention relates to a heating furnace pure oxygen combustion and carbon dioxide capture process, belonging to the technical field of industrial furnaces and gas separation and purification. Background technique [0002] Existing steel rolling heating furnaces generally adopt flame combustion, and flame combustion all uses air as a combustion-supporting medium. The air required for the combustion of the heating furnace is usually obtained from the atmosphere by the combustion-supporting fan. The high-pressure air generated by the fan enters the pipeline and the burner in turn, and the flow and pressure are controlled by the instrumentation equipment to participate in the combustion. The flue gas produced by the combustion of air and fuel is directly discharged into the atmosphere by the chimney or induced draft fan. The noise generated by the combustion fan during operation is unavoidable. [0003] Among them, the presence of about 79% nitrogen i...

AI Technical Summary

Problems solved by technology

my country's industry needs CO 2 Most of them are obtained by calcining limestone, using chemical industry and brewing tail gas, etc., but the energy consumption of the process is high

While conventional combustion and lower concentrations of oxygen-enriched combustion product flue gas components are mostly nitrogen, CO 2 concentration is low, its CO 2 more difficult to capture

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