A system and method for rice husk gasification coupled with sodium silicate to capture carbon dioxide from power plant flue gas

Abstract

The invention discloses a system and a method for trapping power plant smoke carbon dioxide by rice husk gasified coupled sodium silicate. The system comprises a rice husk gasified coupled Na2SiO3 preparation furnace, a charge electric appliance, an electric field auxiliary fluidized reactor, a material separation apparatus, a dissolving device and a filter which are connected in sequence, whereinan input end of the rice husk gasified coupled Na2SiO3 preparation furnace is an inlet for synthetic raw materials, O2 and Na2CO3 solution, and an output end is also connected with a first heat exchanger; a second heat exchanger is arranged in the electric field auxiliary fluidized reactor; the material separation apparatus is two levels of cyclone separators which are connected successively, theupper output end of the two levels of cyclone separators is connected with a third heat exchanger, a lower output end of the two levels of cyclone separators is connected to the electric field auxiliary fluidized reactor, and an additional pipeline is arranged to connect a fourth heat exchanger and a dissolving device; and an output end of the filter is connected to the rice husk gasified coupledNa2SiO3 preparation furnace. The system is organic combined with a coal fired power generation system, and the smoke of a coal fired power station exchanges heat with a bed body to keep the temperature constant, and the scheme is low in investment cost and low in energy consumption.

Description

technical field [0001] The invention relates to the field of pollutant emission reduction in solid waste resource utilization and energy utilization, in particular to a system and method for rice husk gasification coupled with sodium silicate to capture carbon dioxide from power plant flue gas, which belongs to carbon dioxide capture and emission reduction technology field. Background technique [0002] In recent years, the issue of global warming caused by greenhouse gas emissions has become the focus of widespread concern in the international community. Global warming will cause many disasters, such as melting glaciers, rising sea levels, frequent occurrence of extreme weather, frequent emergence of new diseases, sharp decline in biodiversity, food crisis, new political issues and wars. [0003] China is the CO of the world 2 As the largest emitter country, the current total annual emissions are more than 9 billion tons, and it has become the focus of global compliance. ...

AI Technical Summary

Problems solved by technology

The method is simple and feasible, has high rice husk utilization efficiency and simple process flow, and can effectively reduce CO in power plants. 2 The cost of capture can solve the problem of environmental pollution caused by the accumulation and discharge of rice husks. At the same time, value-added products such as synthetic gas can be produced through rice husk gasification, which truly realizes the resource utilization of waste.

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