Flue gas decarburization system and method utilizing magnetized gas-liquid-solid three phase bed

Abstract

The invention discloses a flue gas decarburization system and method utilizing a magnetized gas-liquid-solid three phase bed, and belongs to the technical field of atmospheric pollutant treatment. The system comprises a magnetized three phase bed absorbing tower, a rich and lean solution heat exchanger, a regeneration tower, and a CO2 storage device. The magnetized three phase bed absorbing tower is connected to the rich and lean solution heat exchanger, the regeneration tower and the CO2 storage device in sequence through pipelines. The regeneration tower is provided with a lean solution outlet, is connected to the rich and lean solution heat exchanger through a pipeline, and is connected to the magnetized three phase bed absorbing tower through a pipeline. CO2 is absorbed by an absorbing agent under the co-effect of magnetic field and magnetic particles. A CO2 rich solution flows through the rich and lean solution heat exchanger and releases CO2 in the regeneration tower, and a CO2 lean solution is obtained at the same time. The lean solution flows through the rich and lean solution heat exchanger, goes back to the three phase bed, and keeps on absorbing CO2. The system utilizes a magnetic field and magnetic particles to increase the CO2 absorption efficiency of an absorbing agent; the rich solution and lean solution both carry with few magnetic particles, which can enhance the heat exchange between rich and lean solutions and the regeneration of absorbing solution and the energy consumption of regeneration is reduced therefore.

Description

technical field [0001] The invention belongs to the technical field of air pollutant treatment, and in particular relates to a flue gas decarbonization system and method using a magnetically added gas-liquid-solid three-phase bed. Background technique [0002] Fossil fuels are the main energy source for humans today, but the combustion of fossil fuels produces a large amount of CO 2 emissions, leading to global warming. in CO 2 The implementation of carbon capture and storage (CCS) in intensive emission industries (such as coal-fired power plants) is the most effective way to solve the contradiction between energy demand and climate change. CCS technology is composed of carbon capture, transportation and storage, among which the cost of carbon capture accounts for 70-80% of the total cost, which is the most critical link. Carbon capture technologies include pre-combustion carbon separation technology, oxygen-enriched combustion technology, chemical looping combustion tech...

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Problems solved by technology

The mass transfer area of ​​the sieve plate column is small, the structure is complex, and most of them work under pressure

Chinese patent document CN101423214A uses a packed tower for decarburization, the packed tower has a large production capacity and high separation efficiency, but when ammonia water absorbent is used, ammonia water and CO 2 The reaction product of the reaction product will form crystallization and plug the packing

However, when the flue gas flow rate is large, the gas-liquid contact time is short, and the CO 2 It is difficult to improve the removal rate

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