Micro-nano ceramic-tube-beam water-film type integrated removal apparatus for flue gas pollutants

Abstract

The invention discloses a hollow porous micro-nano ceramic-tube-beam water-film type integrated removal apparatus for flue gas pollutants, and belongs to the coal-fired power plant energy-saving emission-reduction technologies. The apparatus comprises an upper cover plate (1), a hollow porous micro-nano ceramic-tube-beam assembly (2), a water inlet chamber (3) and associated pipelines (4) thereof, a sewage chamber (11) and associated pipelines (12) thereof, an upper glass fiber reinforced plastic support plate (7), a lower glass fiber reinforced plastic support plate (8), a front side plate (9), a rear side plate (10), and sealing fixing parts. Under driving of pressure difference, a dense water film is formed on the outer surface of a ceramic pipe (17), when flue gas transversely skims over the ceramic-tube-beam assembly (2), gypsum liquid drops, water vapor, tiny particles, and SO2, H2SO4(SO3) aerosol and other acidic compositions in flue gas are captured by the water film, the captured pollutants and condensed water float down the stream, are gathered in the sewage chamber (11), and are sent to a sewage disposal plant through the sewage pipelines (12). The apparatus is simple in structure, low in cost, resistant to corrosion and long in service life, is capable of realizing clean discharge of a coal-fired power plant, also is capable of recovering and utilizing water source in flue gas, and possesses extensive engineering application prospect.

Description

technical field [0001] The invention relates to an integrated removal technology for flue gas pollutants of coal-fired boilers, specifically a technology for synergistic removal of gypsum droplets, water vapor, fine particles and SO in flue gas. 2 、H 2 SO 4 (SO 3 The invention relates to a hollow porous micro-nano ceramic tube bundle water film type flue gas pollutant integrated removal device for aerosol, which belongs to the technical field of energy saving and emission reduction of coal-fired thermal power plants. Background technique [0002] After the tail flue gas of the coal-fired boiler in a thermal power plant flows out of the air preheater, it first passes through an electrostatic or bag filter to remove fly ash in the flue gas, then enters a desulfurization tower to remove sulfur oxides, and finally is discharged to the atmosphere through a chimney. In the conventional flue gas limestone-wet desulfurization system, the flue gas will be discharged from the desul...

AI Technical Summary

Problems solved by technology

In the conventional flue gas limestone-wet desulfurization system, the flue gas will be discharged from the desulfurization system after spraying, desulfurization and other processes from about 120-140 °C at the entrance to about 50 °C. At this time, the flue gas contains a large amount of Gypsum droplets, saturated water vapor, fine particles and SO 2 、H 2 SO 4 (SO 3 ) aerosols and other acidic substances, they are discharged into the atmosphere together, which not only pollutes the environment, but also wastes the precious water resources in it

[0003] At present, there are many kinds of dedusting equipment used for boiler flue gas in thermal power plants, such as electrostatic precipitator, bag filter, water film precipitator, and vortex precipitator. The acid dew point temperature, and the flue gas contains a large number of gypsum droplets, saturated water vapor, fine particles and SO 2 、H 2 SO 4 (SO 3 ) aerosols and other acidic substances, the above dust removal technology has been difficult to meet the deep removal of gypsum droplets, saturated water vapor, fine particles and SO 2 、H 2 SO 4 (SO 3 ) aerosol and other requirements, which in turn caused the phenomenon of "white smoke" from the chimneys of thermal power plants and the consequences of fine particulate matter polluting the atmospheric environment

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