Nitrogen-insulating combustion and CO2 capture and utilization process for gas-fired boiler

Abstract

The invention discloses a gas-fired boiler nitrogen-insulating combustion and CO2 capture and utilization process. A system required by the process comprises a natural gas supply device, a water electrolysis hydrogen production device, an oxygen preparation device, a nitrogen compressor, a carbon-based nitrogen-insulating gas mixer, a gas heat exchanger, a gas-fired boiler, a chimney, a flue gas dehydration device, an air blower, a CO2 recovery 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 and natural gas can be reduced by 10% or above, the yield can be improved by 10% or above, the flue gas emission is reduced, and ultralow emission of NOx is achieved.

Description

technical field [0001] The invention relates to the technical field of combustion, in particular to a nitrogen-absolute 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 gas-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 consumption; at the same...

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Problems solved by technology

[0003] At present, gas-fired boilers mostly 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 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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