Phase change cold condensation device

Abstract

The invention discloses a phase change cold condensation device. The phase change cold condensation device is characterized in that a first-stage heat exchange unit, a second-stage heat exchange unitand a third-stage heat exchange unit are sequentially arranged in a heat exchange shell; each stage of heat exchange unit is structurally characterized in that multiple rows of heat exchange pipe setsare included, all heat exchange pipes in each heat exchange pipe set are in end to end connection through multiple heat exchange bend pipes to form multiple snake-shaped heat exchange pipelines, inlets of the snake-shaped heat exchange pipelines communicate with a water inlet collection box at the same time, and outlets of the snake-shaped heat exchange pipelines communicate with a water outlet collection box; density of the heat exchange pipes in the first-stage heat exchange unit is higher than that of the heat exchange pipes of the second-stage heat exchange unit, and the density of the heat exchange pipes of the second-stage heat exchange unit is higher than that of the heat exchange pipes of the third-stage heat exchange unit; and the pipe diameter of the heat exchange pipes in the first-stage heat exchange unit is smaller than that of the heat exchange pipes in the second-stage heat exchange unit, and the pipe diameter of the heat exchange pipes in the second-stage heat exchangeunit is smaller than that of the heat exchange pipes in the third-stage heat exchange unit. The device can effectively solve large white smoke during smoke exhausting.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a phase change condensation condensation device. Background technique [0002] my country's energy structure determines that coal combustion is one of the important sources of air pollutants. Most coal-fired power plants are equipped with desulfurization and dust removal equipment, striving to achieve ultra-low emissions to meet increasingly stringent environmental protection emission requirements. At present, the ultra-low emission technology routes include low and low temperature routes (adding low-temperature economizers before electrostatic precipitators) and wet circuit routes (adding wet electrostatic precipitators after desulfurization). However, both routes inevitably have a serious "big white smoke" phenomenon when the high-humidity flue gas after wet desulfurization is discharged from the chimney. Contents of the invention [0003] The purpose of the prese...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method that can simultaneously remove various fine particle pollutants in the high-humidity flue gas while recovering the moisture in the high-humidity flue gas after wet desulfurization, and can effectively solve the problem of exhausting the flue gas. Phase change condensation condensation device for "big white smoke" phenomenon

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