New cross-convective flue gas purification absorption tower

Abstract

The invention discloses a new cross-convective flue gas purification absorption tower. The new fault-convective flue gas purification absorption tower from top to bottom comprises a feeding hopper, a distributing device, an active coke bed layer and a discharging hopper communicated in sequence, wherein a middle flue gas collecting chamber is arranged in the active coke bed layer; the two-layer discharging hopper is arranged at the lower part of the active coke bed layer; the external part of the active coke bed layer is divided into an upper pure flue gas collecting chamber and a lower raw flue gas distributing chamber by a two-layer annular separating plate; an outlet flue is formed in the upper part of the pure flue gas collecting chamber; a raw flue gas inlet flue communicated with the raw flue gas distributing chamber is arranged at the lower part of the raw flue gas distributing chamber; and the active coke bed layer, the middle flue gas collecting chamber, the raw flue gas distributing chamber and the pure flue gas collecting chamber and the cross section of the overall tower body are circular. By adopting the absorption tower disclosed by the invention, the removal efficiency of the pollutant in the flue gas is high; the removal efficiency of SO2 is greater than 96%; the removal efficiencies of SO3, HCl and HF are greater than 98%; the removal efficiency of heavy metal Hg is greater than 90%; and the dust collection efficiency is greater than 80%; and meanwhile, the absorption tower disclosed by the invention also has the advantages of being convenient and uniform in feeding, smooth in blanking, high in utilization rate of the active coke and easy to enlarge.

Description

technical field [0001] The invention relates to an active coke dry method adsorption tower for desulfurizing waste gas from power plant boilers, metallurgy, garbage incineration and chemical industries, and in particular to a novel cross-convection flue gas purification adsorption tower. technical background [0002] In the field of flue gas desulfurization of coal-fired power stations, more than 90% of them currently use the limestone-gypsum wet flue gas desulfurization process. Although this process is mature and widely used, its shortcomings have gradually emerged during the application process: 1) High water consumption: For power plant boiler flue gas desulfurization devices without flue gas heat exchanger GGH, the equivalent water consumption per million kilowatt units is as high as 150-200m 3 / h; 2) Chimney anti-corrosion and "gypsum rain" problem: the flue gas at the outlet of the wet desulfurization device is saturated wet flue gas, the chimney must be high-level an...

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Problems solved by technology

[0002] In the field of flue gas desulfurization of coal-fired power plants, more than 90% of them currently use limestone-gypsum wet flue gas desulfurization process. Although this process is mature and widely used, its shortcomings are gradually emerging during the application process: 1) High water consumption: For power plant boiler flue gas desulfurization devices without flue gas heat exchanger GGH, the water consumption equivalent to every million kilowatt units is as high as 150-200m 3 / h; 2) Chimney anti-corrosion and "gypsum rain" problems: the flue gas at the outlet of the wet desulfurization device is saturated wet flue gas, the chimney must be high-level anti-corrosion, and the chimney "gypsum rain" problem may also occur, causing damage to the surrounding environment Secondary pollution; 3) Carrying of liquid droplets in clean flue gas: the liquid droplets carried in clean flue gas are gypsum slurry with a concentration of about 20%, which contains certain solid particles, which is dust pollution when discharged into the atmosphere; 4) Limestone Extensive mining and gypsum accumulation: due to the widespread use of limestone-gypsum wet flue gas desulfurization technology, a large number of limestone mountains have been mined, and desulfurization gypsum accumulation in some areas

[0005] The adsorption tower is the core equipment of the activated coke flue gas desulfurization process, but the application of this process in my country is just in its infancy, especially the power plant scale application has no performance in my country, so my country urgently needs to develop a new type of adsorption tower with independent intellectual property rights structure

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