Calcium-based moving bed full-dry desulfurization and dust removal method and device

Abstract

The invention relates to the technical field of flue gas desulfurization and dust removal, in particular to a moving bed full-dry desulfurization and dust removal technology, which comprises a feeding process, a desulfurization and dust removal process and a discharging process, in the feeding process, a desulfurizing agent is sent to all desulfurizing agent bins in a moving bed dry tower, a desulfurizing agent recycling process is arranged between the discharging process and the feeding process, according to the utilization rate condition of each desulfurizing agent bin, the old desulfurizing agent in the desulfurizing agent bin with the low utilization rate is taken out from the desulfurizing agent bin and then is fed into the desulfurizing agent bin again, and the old desulfurizing agent in the desulfurizing agent bin with the high utilization rate is taken out and then is sent to waste recycling treatment. Compared with the prior art, the method has the advantages that the utilization rate of the desulfurizing agent is increased, the sulfur capacity is increased, the usage amount of the desulfurizing agent is reduced, and the operation cost is saved.

Description

Technical field [0001] The present invention relates to the field of flue gas debrisulfur removal technology, in particular, the full dry desulfurization and dust removal technology of mobile bed. Background technique [0002] With the increasingly tightening of environmental protection policies, the requirements of the country's impact on flue gas governance are increasingly strict. Some provinces and cities have a higher demand for the ultra-low emissions of particulate matter and sulfur dioxide, as well as the flue gas removal of white cigarettes, namely: particulate matter ≤10mg / m 3 , Sulfur dioxide ≤10mg / m 3 The chimney export is not white smoke (white smoke is formed of liquid water droplets carrying the flue gas). [0003] At present, the flue gas from Tao Enterprises is mainly the flue gas produced by the kiln combustion, and the exhaustive temperature is generally 100-300 ° C. [0004] At present, most of the flue gas governance processes are wet. This process needs ...

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Problems solved by technology

[0006] (2) Generation of white smoke: part of the added water is discharged from the top of the chimney along with the flue gas, forming mist to block the sun, visually producing thick white smoke, causing visual pollution and causing complaints from surrounding residents

[0009] (5) High cost of particulate matter removal: Wet desulfurization alone cannot reduce particulate matter emission concentration to 10mg / m 3 Below, an additional wet electrostatic precipitator with high power consumption is required to meet the ultra-low emission standard of particulate matter

[0010] (6) There are many pumps and rotating machines, making operation and maintenance difficult

However, due to the lack of adjustment measures, when the activity of the desulfurizer is strong, all the sulfur dioxide is absorbed, and the concentration of sulfur dioxide in the net flue gas is 0, which is also an unnecessary consumption of the desulfurizer

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