Coal-fired boiler carbon-based oxygen-enriched combustion and CO2 capture and utilization process

Abstract

The invention discloses a coal-fired boiler carbon-based oxygen-enriched combustion and CO2 capture and utilization process. A system required by the process comprises a pulverized coal supply device, a water electrolysis hydrogen production device, an oxygen / enriched oxygen preparation device, a nitrogen compressor, a carbon-based gas mixer, a gas heat exchanger, a coal-fired boiler, a chimney, a flue gas dehydration and desulfurization device, an air blower, a CO2 purification device, a CO2 deoxidation device and a CO2 compressor. The method has excellent performance in the aspects of yield increase, energy conservation and emission reduction, the unit consumption of per ton of steam natural gas can be reduced by 3-10%, the yield can be improved by 3-10%, the flue gas emission is reduced, and ultralow emission of NOx and SO2 is realized.

Description

technical field [0001] The invention relates to the field of combustion technology, in particular to a carbon-based oxygen-enriched combustion and CO 2 capture and utilization process. Background technique [0002] As global warming touches various aspects such as ecological security, water resource security, and food security, it intensifies the risk of extreme climate disasters and seriously threatens the living environment of human beings. Greenhouse gas emissions are the most important factor causing global warming, among which CO 2 The greenhouse effect produced accounts for more than 70% of all greenhouse gases, so CO 2 Emission reduction is an urgent problem to be solved, which is crucial to controlling the greenhouse effect and slowing down global warming. [0003] At present, most coal-fired boilers use air to support combustion. Only 21% of the oxygen in the air participates in combustion, and 78% of nitrogen does not participate in combustion. High fuel consum...

AI Technical Summary

Problems solved by technology

[0003] At present, most coal-fired boilers use air to support combustion. Only 21% of the oxygen in the air participates in combustion, and 78% of nitrogen does not participate in combustion. High fuel consumption; at the same time, nitrogen reacts with oxygen to generate NO at high temperature x , NO x Gases discharged into the atmosphere can easily form acid rain and cause environmental pollution

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