Condensing type white smoke removing system and method for flue gas slurry

Abstract

The invention discloses a condensing type white smoke removing system and method for flue gas slurry. The white smoke removing system comprises a desulfurization tower and a water cooling tower, wherein the desulfurization tower is sequentially provided with a slurry tank, a flue gas inlet, a heat exchange layer, a spraying layer, a demister and a flue gas outlet from bottom to top; the slurry tank is connected with the spraying layer through a pipeline; the pipeline is provided with a first water pump; the heat exchange layer comprises a plurality of heat exchangers; the plurality of heat exchangers are uniformly distributed on the cross section of the desulfurization tower; heat exchange pipes on each heat exchanger are arrayed in a matrix; the heat exchange pipes on adjacent layers in the vertical direction are distributed in a staggered manner; the heat exchange pipes are parallel to the cross section of the desulfurization tower; a water cooling tank is arranged at the bottom of the water cooling tower; a water inlet and a water outlet of each heat exchanger are connected with the water cooling tank through a pipeline and each pipeline is provided with a second pump. Accordingto the condensing type white smoke removing system, the modularized heat exchangers are arranged between an inlet flue of the desulfurization tower and the spraying layer on the bottommost layer anda space in the tower is sufficiently utilized; white smoke of flue gas is alleviated and even removed and the water consumption in a desulfurization process is reduced.

Description

technical field [0001] The invention belongs to the technical field of flue gas whitening elimination in wet desulfurization absorption towers, and in particular relates to a flue gas slurry condensation type whitening system and method. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Considering the technology maturity and cost factors comprehensively, the flue gas desulfurization technology widely used in my country's coal-fired power plants at this stage is the wet desulfurization process. The net flue gas temperature at the outlet of the absorption tower in the wet desulfurization process is generally around 50°C, which is in a saturated state with a high moisture con...

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Problems solved by technology

The inventor found that only raising the temperature of the flue gas after desulfurization is not only costly, but also the actual pollutants are not eliminated, and the pollutants are discharged into the air with the flue gas, which will cause certain harm to the environment

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