Apparatus of coal-burning boiler for flue gas desulfurization, denitration, defluorination and dust abatement

Abstract

The invention discloses a desulfurizing denitration defluorination dust particle removing device for flue gas in a coal-fired boiler, which comprises a lime water adding device, an automatic control system for catalyst, an automatic filter press and a tank body; the upper part of the tank body is spaced into three reaction chambers and a demisting chamber by a demarcation strip; on the tank body, a flue inlet and a flue outlet are arranged on the tank body; a channel is arranged between the reaction chamber and the demisting chamber; the lower part of the tank body is provided with a reaction fluid storing chamber and a demisting and defluiding chamber; a cycling pump is arranged outside the tank body, and is respectively communicated with nozzles arranged at the top of the reaction chamber by a fluid conveying tube; sewage draining exits are arranged at the lower ends of the reaction liquid storing chamber and the demisting and defluiding chamber; a cycling pool is arranged below the sewage draining exits; a cycling pump is arranged outside the cycling pool and is communicated with the reaction liquid storing chamber and demisting chamber; an oxidation pool is arranged below the cycling pool and is communicated with the filter press; the cycling pump is arranged outside the demisting and defluiding chamber and is communicated with the nozzles arranged above the demisting chamber. The desulfurizing denitration defluorination dust particle removing device can simultaneously desorb four pollutants in flue gas-fume, SO2, NOx and fluoride, and solves the problem that the function is single in the prior art.

Description

technical field [0001] The invention belongs to the technical field of boiler flue gas treatment supporting equipment, and relates to a coal-fired boiler flue gas purification device, in particular to a coal-fired boiler flue gas desulfurization, denitrification, defluorination, and fine dust removal device. Background technique [0002] Due to the different coal quality and boiler type, the unit content of pollutants in the flue gas is also different, such as soot: 9 ~ 60g / m 3 , SO 2 500~9500mg / m 3 , NO x 400~2000mg / m 3 , HF33~67mg / m 3 . Sulfur dioxide and nitrogen oxides are the main components of acid rain. Acid rain is the main pollutant that affects air quality. When it settles on the ground, it will cause soil compaction, fertility decline, water acidification, ecological imbalance, corrosion of buildings and open-air materials, causing huge economic losses and destroying human cultural relics. Soot and SO in flue gas of coal-fired boiler 2 , NO x HF and HF ca...

AI Technical Summary

Problems solved by technology

The existing technology only has a single removal function. When used in series, the material consumption and energy consumption are often too large, and the operating cost is too high

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