Compound airflow generator, circulating fluidized bed tower-front two-phase premixing device and method

Abstract

The invention provides a compound airflow generator which comprises a plurality of fixing plate supports, a plurality of rotational flow guide vanes, an inner sleeve and an outer sleeve, wherein two ends of each rotational flow guide vane are respectively arranged on the external wall of the inner sleeve and the inner wall of the outer sleeve, the included angle between the plane of each rotational flow guide vane and the horizontal plane is 30-70 degree, the fixing plate supports are used for fixing the structure formed by the outer sleeve, the inner sleeve and the rotational flow guide vanes, one end of each fixing plate support is arranged on the external wall of the outer sleeve, the other end of the fixing plate support is arranged on the inner wall of a tower front flue, and the fixing plate support is vertically arranged. After passing by the compound airflow generator, smoke forms a direct current airflow in the inner sleeve, forms rotational flow between the inner sleeve and the outer sleeve, and forms a direct current airflow outside the outer sleeve, thus forming a direct-rotational-direct airflow flow field, under the disturbance of the direct-rotational-direct airflow flow field, particle granules and the smoke are premixed and homogenized, so that the smoke thoroughly reacts in a purification tower, and the purification efficiency of the smoke is improved.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a composite gas flow generator and a two-phase premixing device and method before a circulating fluidized bed tower. Background technique [0002] SO contained in boiler flue gas 2 , SO 3 , HCl, HF, NOx, heavy metals, PM2.5, dioxin and other multi-component pollutants. In order to purify the flue gas and remove the toxic substances in the existing technology, the flue gas drying of the circulating fluidized bed is often used. Multi-pollutant synergistic purification process, this process is a rapid removal of SO from flue gas by using the intense turbulence and efficient heat and mass transfer in the fluidized bed 2 , SO 3 , HCl, HF, NOx, heavy metals, PM2.5, dioxin and other multi-component pollutant technologies. The circulating fluidized bed flue gas dry multi-pollutant synergistic purification process has the advantages of large amount of flue gas treatment,...

AI Technical Summary

Problems solved by technology

Although the device increases the residence time of the material particles and the flue gas in this area, it does not improve the mixing and homogenization distribution of the material particles and the flue gas. The concentration of the discharged material particles strengthens the ring-core flow mode, making the mixing and distribution of the flue gas and the material particles uneven, which will reduce the purification efficiency

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