Cyclone plate dedusting and demisting device and method capable of preventing secondary carrying

Abstract

The invention discloses a cyclone plate dedusting and demisting device and method capable of preventing secondary carrying. The device is sequentially sleeved with an outer barrel, a screen barrel and a center barrel at intervals from outside to inside, a flushing water pipe is arranged in the center barrel, and a flushing nozzle mechanism is arranged on the upper portion of the flushing water pipe; a water collecting tank is formed between the lower part of the screen barrel and the outer barrel; and an automatic drainage pipe valve is arranged at the lower part of the water collecting tank. Flue gas enters through the bottom of the device, is subjected to centrifugal separation and liquid film dust removal through multi-stage cyclone plates, and is discharged from the top of the device; flushing water is distributed to nozzles arranged in a dot matrix through the center barrel, and the dual functions of flushing and film forming are achieved on the surface of the rotational flow plate. and dust-containing wastewater in the flue gas is centrifugally separated, enters the water collecting tank through the screen barrel, and is discharged by the automatic discharge drain pipe valve. The device is good in film-forming property and high in dedusting and demisting efficiency, the screen can effectively prevent secondary carrying of flue gas, and the problems that a conventional demister is low in efficiency, easy to block, serious in secondary carrying and the like are fundamentally solved.

Description

technical field [0001] The invention relates to a flue gas treatment device and a chimney swirl flow demist removal and dust separation process, in particular to a swirl plate dust removal device and method for preventing secondary carryover. Background technique [0002] In recent years, with the rapid development of industry, air pollution has become increasingly serious, among which SO 2 And fine particles are the main air pollutants produced by coal combustion. [0003] In order to implement environmental protection policies, various coal-fired industrial enterprises have widely used flue gas desulfurization devices. According to statistics, 90% of thermal power units use limestone-gypsum wet desulfurization. The flue gas after desulfurization will contain a large number of dust particles and slurry droplets with different particle sizes. If it is directly discharged into the atmosphere, it will form a phenomenon of "gypsum rain" in the surrounding area, causing second...

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Problems solved by technology

[0008] The invention separates the flue gas flow area from the liquid film of the outer cylinder wall through the screen cylinder to form two different areas, which completely prevents the secondary carryover caused by the high-speed smoke flowing through the liquid film and tearing the liquid film, and fundamentally solves the problem. The problem of secondary carryover; through the flushing nozzle mechanism, a continuous and stable liquid film is formed on the surface of the swirl plate, which solves the problem of poor film formation, low dust removal efficiency, and the sticking of smoke and dust particles on the surface of the swirl plate in actual engineering applications. The problem of scale blockage; the accumulated water is collected through the sump, and the water is automatically drained, which completely solves the problem of water balance

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