A circulating fluidized bed enhanced ammonia carbon capture device

Abstract

The invention discloses a circulating fluidized bed enhanced ammonia carbon capture device, comprising: a circulating fluidized bed, a crystallization separator, an ammonia water absorber, an ammonia-carbon separator, a desorber, a desorption solution pump, a mixed liquid storage tank, Lean liquid pump and other components. The concentrated ammonia water in the mixed liquid storage tank is connected to the gas-liquid distributor of the circulating fluidized bed through the lean liquid pump. After the flue gas and the ammonia water are fully contacted in the circulating fluidized bed, the rich liquid is separated by the solid-liquid separator and cooled by the cooler. It is connected to the crystal separator; the liquid outlet at the lower part of the crystal separator is connected to the ammonia water absorber, which is used to absorb the liquid ammonia desorbed and separated by the desorber and the carbon ammonia separator to regenerate the ammonia water absorbent; the outlet of the ammonia water absorber is connected to the mixed liquid storage tank , while the liquid outlet of the desorber is also connected to the mixed liquid storage tank. The circulating fluidized bed enhanced ammonia capture device of the present invention utilizes a circulating fluidized bed to strengthen the absorption of carbon dioxide and improve the absorption efficiency.

Description

Technical field [0001] The present invention relates to the field of carbon dioxide capture and separation technology, specifically to a circulating fluidized bed enhanced ammonia carbon capture device. Background [0002] Due to the development of industrialization, a large number of fossil fuels burning, resulting in excessive emissions of greenhouse gases dominated by carbon dioxide in the atmosphere, resulting in an increase in global temperature more and more obvious, controlling carbon dioxide emissions is an important means and necessary measures to control the rise in global temperature, in many emission reduction measures, carbon dioxide capture and storage technology is undoubtedly an effective measure to effectively reduce carbon dioxide emissions. Among the many carbon dioxide capture technologies, the chemical absorption method of flue gas after combustion is the most mature and widely used technology at present, of which ammonia carbon capture technology is one of t...

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Problems solved by technology

[0003] However, ammonia has the inherent defect of high volatility, and ammonia escape during the application of ammonia-based carbon capture seriously limits its popularization and application.

In order to suppress the escape of ammonia, reducing the concentration of ammonia water is indeed effective in reducing the escape of ammonia, but it also reduces the absorption efficiency of carbon dioxide

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