Flue gas white-smoke eliminating system of heating boiler

Abstract

The invention provides a flue gas white-smoke eliminating system of a heating boiler, belongs to the technical field of boilers, and solves the problems of a poor white-smoke eliminating effect and insufficient stability of an existing heating boiler. The flue gas white-smoke eliminating system of the heating boiler comprises a boiler body and a chimney, and is characterized in that a primary energy saver, a secondary energy saver, a condenser, a condensing device, a pre-heating white-smoke eliminating device, a mixing accelerating device and a chimney are sequentially connected between the boiler body and the chimney; a primary heating water circulation pipeline is arranged between the boiler body and the primary energy saver; a secondary heating water circulation pipeline is arranged between the secondary energy saver and the condenser; and an air pipeline for introducing preheated air is connected onto the mixing accelerating device. Through arranging more than three groups of heatexchangers, the boiler flue gas temperature is reduced to be below a condensation point, moisture in the flue gas is separated out, and the white smoke of the flue gas can be effectively eliminated.

Description

technical field [0001] The invention belongs to the technical field of boilers, and relates to a hot water heating boiler, in particular to a flue gas whitening system of a heating boiler. Background technique [0002] In the existing boiler flue gas treatment system, the flue gas produced by the boiler usually passes through the air preheater, dust collector, induced draft fan, and desulfurization absorption tower in sequence, and then is discharged into the chimney and enters the atmosphere; Part of the waste heat of the flue gas will be recovered in the desulfurization tower, but due to the low-temperature corrosion of the air preheater, the temperature of the flue gas discharged from the outlet of the air preheater is still high, so the temperature of the flue gas entering the desulfurization tower is still high, absorbing The desulfurization slurry in the tower will absorb a large amount of latent heat of vaporization, and part of the water will be evaporated and discha...

AI Technical Summary

Problems solved by technology

Although it can recover heat and eliminate white smoke, it often causes inconvenient chimney discharge due to the low temperature of the flue gas after condensation, which affects the emission efficiency and effect; After mixing with cold air, it is easy to cause the mixed air to reach the dew point temperature and bring a large amount of moisture

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