Carbon dioxide capturing system for concentration conversion and electrolysis regeneration

Abstract

The invention discloses a carbon dioxide capturing system for concentration conversion and electrolysis regeneration. The bottom of an adsorption column is connected with a feed liquid inlet of a crystallizer; the crystallizer is connected with an inlet of an anode zone of an electrolysis regeneration tank; an overflow inlet of the crystallizer is connected with a cathode inlet of the electrolysis regeneration tank; an electrolysis liquid outlet of the electrolysis regeneration tank is connected with an inlet of a stirring type mixing tank; a barren liquor outlet in the bottom of the stirring and mixing tank is connected with a barren liquor inlet in the upper section of an absorption section; a gas outlet of the cathode zone of the electrolysis regeneration tank is connected with a gas inlet of a first cooler; a gas outlet of the anode zone is connected with a gas inlet of an O2 / CO2 separator; a CO2 pregnant solution is concentrated, so that a component loading CO2 is concentrated or separated further in the pregnant solution, and based on the electrochemistry principle, the CO2 pregnant solution is electrolyzed to generate hydrogen, oxygen and CO2 gas; the regeneration energy consumption and capturing cost can be reduced maximally; electricity energy, such as house supply or wind and light abandoned electricity can be fully utilized, and the abandoned electricity storage energy conversion, CO2 capturing and chemical engineering utilization are integrated.

Description

technical field [0001] The invention relates to technical fields such as process gas purification and carbon dioxide emission reduction, in particular to a carbon dioxide capture system for concentration conversion and electrolytic regeneration. Background technique [0002] carbon dioxide (CO 2 ) is the main greenhouse gas that causes global warming, CO 2 The capture, utilization and storage of sequestration has become one of the hot topics concerned by the international community. my country's coal-fired power generation CO 2 Emissions account for about 50% of total industrial emissions, CO in flue gas from coal-fired power plants 2 The capture and separation of carbon dioxide is an important area of ​​greenhouse gas emission reduction. In addition, there are also large amounts of CO in industrial fields such as steelmaking, cement, and chemical industry (such as ammonia synthesis, hydrogen production, and natural gas purification). 2 capture or separation process. C...

AI Technical Summary

Problems solved by technology

For thick slurry type CO 2 As far as capture technology is concerned, the rich phase during regeneration is mainly crystal slurry, and the use of traditional packing or spray regeneration towers may cause crystals to block internal components or easily scale

In recent years, renewable energy such as wind power and photovoltaics has developed rapidly in China, but it has also produced a large number of wind power curtailment, resulting in waste of resources and energy. How to store wind power curtailment and energy storage has become one of the main problems currently facing

Images