Tandem type heat compensation and heat regeneration combined photo-thermal coupling methane/carbon dioxide dry reforming system and method based on same

Abstract

The invention discloses a tandem type heat compensation and heat regeneration combined photo-thermal coupling methane / carbon dioxide dry reforming system and a method based on the same, and belongs to the field of synthesis gas preparation through carbon dioxide / methane dry reforming. The system mainly comprises a photo-thermal dry reforming unit, a product separation unit, a flue gas purification unit, a heat exchanger and a gas mixing device. The flue gas purification unit is used for purifying the tail gas of a power plant, carbon dioxide and methane in the tail gas are recycled, purified gas enters a heat exchanger to be preheated and then is fully mixed in the gas mixing device, then the photo-thermal dry reforming unit is used for preparing synthesis gas, emission of carbon dioxide can be reduced, and unreacted carbon dioxide and methane are separated out through the product separation unit, and are input into a photo-thermal coupler for continuous reaction, so that the energy utilization rate is improved. Meanwhile, the photo-thermal coupling reactor can reduce the reaction temperature, and process gas regenerative heat is utilized to preheat raw materials after the reaction is completed. The dual effects of carbon emission reduction and energy consumption reduction can be effectively realized.

Description

technical field [0001] The invention belongs to the field of producing synthesis gas by dry reforming of carbon dioxide / methane, and in particular relates to a light-heat coupled methane / carbon dioxide dry reforming system and a method based on it, which combine heat supplementation and recuperation in series. Background technique [0002] In 2020, my country's carbon dioxide emissions from fossil energy combustion will be about 80×10 8 t, more than 1 / 5 of the total global carbon dioxide emissions, of which, the power industry carbon dioxide emissions account for about 40% of the country's total emissions. In order to reduce carbon dioxide emissions, my country proposes that carbon dioxide emissions will reach a peak around 2030, which requires the power industry to optimize production processes in the industrial production process, reduce carbon dioxide emissions, and collect and utilize the emitted carbon dioxide as much as possible. [0003] At present, dry reforming of ...

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Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a light-thermal coupling methane / carbon dioxide dry reforming system and a method based on it, which can solve the problem of a large amount of carbon dioxide in thermal power plants at present. Emission issues, as well as the current technical issues of high energy consumption and low energy utilization in the process of methane carbon dioxide reforming

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