Light-promoted carbon dioxide desorption reaction device and desorption method

Abstract

The invention provides a light-promoted carbon dioxide desorption reaction device and desorption method. The device comprises an absorption reactor and a desorption reactor; the absorption reactor andthe desorption reactor are communicated through a pump; the absorption reactor is a darkroom and is internally provided with an absorption solution; the absorption reactor is further provided with aflue gas inlet pipe and a nitrogen outlet pipe, the lower end of the flue gas inlet pipe is located below the liquid level of the solution, and the lower end of the nitrogen outlet pipe is located above the liquid level of the solution; an illumination device is arranged on one side of the desorption reactor, and a carbon dioxide exhaust pipe is arranged at the top of the desorption reactor. According to the invention, carbon dioxide desorption can be realized at normal temperature, namely within 20-50 DEG C, and energy is saved.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a light-promoted carbon dioxide desorption reaction device and a desorption method. Background technique [0002] Efficient and economical carbon capture is one of the key technologies to achieve large-scale reduction of carbon dioxide emissions. A considerable part of China's carbon dioxide emissions comes from coal-fired power plants, accounting for 37% of the total emissions. Post-combustion carbon dioxide capture is the most feasible technical means to solve the problem of carbon dioxide emissions from coal-fired power plants. Among them, the organic amine method captures carbon dioxide with large absorption capacity, high selectivity, and low requirements for external devices, but the main problem it faces is the high energy consumption of carbon dioxide desorption, which accounts for 70% to 80% of the total energy consumption in the capture process. Carbon diox...

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Problems solved by technology

Among them, the organic amine method captures carbon dioxide with large absorption capacity, high selectivity, and low requirements for external devices, but the main problem it faces is the high energy consumption of carbon dioxide desorption, which accounts for 70% to 80% of the total energy consumption in the capture process.

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