Coagulation-enhanced type cyclone dedusting and demisting device

Abstract

The invention discloses a coagulation-enhanced type cyclone dedusting and demisting device, belonging to the field of waste gas treatment. The device comprises a cylindrical outer barrel and m cyclone assemblies; each cyclone assembly comprises a plurality of cyclone blades and a center cylinder, wherein the cyclone blades are evenly distributed in a ring-shaped area between the outer wall of the corresponding center cylinder and the inner wall of the cylindrical outer barrel at an inclined angle; n stages of coagulation devices are arranged in the cylindrical outer barrel at the parts among the at least one group of connected cyclone assemblies. The coagulation devices are additionally arranged among the cyclone assemblies, so that the probabilities of inertial impaction, intercept and coagulation between fine-particle dust and sprayed coagulated liquid drops are improved, the capture property of the dust is improved, the removal efficiency is increased under the condition of the same stage number of cyclone assemblies, or to say, the stage number, needed by reaching the equal efficiency, of the cyclone assemblies is reduced, and the investment and the running costs are lowered.

Description

technical field [0001] The invention belongs to the field of waste gas treatment, and in particular relates to a condensation-enhanced cyclone dust and mist removal device. Background technique [0002] At present, the existing coal-fired units in my country generally adopt the limestone-gypsum wet flue gas desulfurization process. Limestone, gypsum slurry, etc. in the state of fog droplets. With the increasing national environmental protection emission standards, it is necessary to perform deep dust removal on the clean flue gas after desulfurization. According to the newly promulgated "Emission Standards of Air Pollutants for Thermal Power Plants", the dust concentration emitted by the chimney is proposed to be 5mg / m 3 requirements. [0003] Dust and fog removal of flue gas is the most common process in the flue gas purification process. There are various types, but it is difficult to deal with the saturated wet flue gas containing a large number of mist droplets. In ord...

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Problems solved by technology

[0005] This type of mist eliminator realizes the separation of droplets or particles by centrifugal force. When the load is low or the particle size is too small, the separation efficiency is poor because the centrifugal force is small or the centrifugal force is not enough to separate small particles, although it can Increase the number of demisters to achieve a certain removal efficiency, but the investment and operating costs have risen sharply, and even in some cases it is difficult to meet the emission requirements even if the number of demisters is increased

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