Carbon circulating system and method based on ammonia-process decarburization and electrocatalytic reduction utilization

Abstract

The invention discloses a carbon circulating system and method based on ammonia-process decarburization and electrocatalytic reduction utilization, and belongs to the technical field of green energy application. The invention aims to solve the problems of capture, utilization, conversion and storage of carbon dioxide. The system comprises an ammonia-process decarburization system, an electrocatalytic reduction system, a clean energy recovery system and a remelting regulation and control system. Flue gas at the tail end of a boiler of a thermal power generating unit is introduced into the ammonia-process decarburization system for CO2 removal, generated ammonium bicarbonate crystals and carbonized liquid are catalytically reduced through the electrocatalytic reduction system to generate clean energy sources such as CO and formic acid after treatement; after recovered and treated by the clean energy recovery system, the clean energy is used for remelting regulation and control and for providing chemical industrial raw materials; and when the thermal power generating unit is in high-load operation, the remelting regulation and control system provides clean energy to enter a furnace, and when the thermal power generating unit is in low-load operation, excess electric energy is provided for the electrocatalytic reduction system. According to the invention, the problem of excessive production capacity caused by clean energy grid connection in a power plant is solved, and an effective carbon circulation system can be formed. The method can be applied to various thermal power generating units.

Description

technical field [0001] The invention relates to a carbon cycle system and method for ammonia decarbonization and electrocatalytic reduction utilization, and relates to the technical fields of decarbonization, carbon cycle and green energy application. Background technique [0002] According to statistics, the consumption of fossil energy still accounted for 85.5% of the total global energy consumption in 2016, and there will be no significant change in the short term. Human beings' excessive dependence on fossil energy (coal, oil, natural gas) has caused the concentration of carbon dioxide emissions in greenhouse gas emissions to rise to the highest level in 800,000 years, reaching 3.3 million tons. In recent years, although the growth rate of carbon dioxide emissions has slowed down, the overall trend is still in a straight line. In 2016, China has become the world's largest carbon emitter, accounting for 27.3% of carbon emissions, nearly 11.3 percentage points higher than...

AI Technical Summary

Problems solved by technology

Due to the large amount of electric energy required, the economy is limited, and the raw material carbon dioxide used for catalytic reduction must be high-purity carbon dioxide

Therefore, the technology is limited to laboratory research and mechanism research

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