Exhaust gas water recycling and white smoke eliminating system through condensation method

Abstract

The invention discloses an exhaust gas water recycling and white smoke eliminating system through a condensation method. The system is characterized by comprising an exhaust gas condensation chamber; a condensation pipe bundle is arranged at an inlet of the exhaust gas condensation chamber, a water flushing device is arranged on one side of the condensation pipe bundle, and a condensation water draining device is arranged at the lower portion of the condensation pipe bundle. By adopting the exhaust gas water recycling and white smoke eliminating system, water recycling and utilization are performed before wet purified exhaust gas is exhausted from a wet-type desulfuration tower, the gypsum component is recycled along with water, the total amount of gypsum rain and aerosol drained to air can be effectively lowered fundamentally, the exhausted exhaust gas temperature is lowered slightly, exhaust gas is exhausted in a dried mode, the white smoke phenomenon at an outlet of a chimney can be greatly reduced, and the effect of eliminating white smoke and gypsum rain can be achieved when no exhaust gas heating device is adopted.

Description

technical field [0001] The invention relates to a condensation method flue gas water recycling system for eliminating white smoke, which is used in the tail flue gas discharge system of a boiler of a large-scale thermal power generation unit, and belongs to the technical field of flue gas discharge at the boiler tail. Background technique [0002] The flue gas exhaust system at the tail of the boiler of the desulfurization unit of the large-scale thermal power plant that adopts wet desulfurization, such as figure 2 As shown, the original flue gas from the air preheater 7 is dust-removed by the electrostatic precipitator 8 and pressurized by the exhaust fan 9, and then enters the flue gas heater (GGH) 10, and is cooled inside the GGH from the wet desulfurization tower (FGD) (FlueGasDesulfurization, flue gas desulfurization, flue gas desulfurization, flue gas desulfurization) After the clean flue gas from 11 is heated, it comes out from the flue gas heater 10 and enters the we...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a condensation method flue gas water recovery and white smoke elimination system that simplifies the boiler tail flue system and alleviates the white smoke phenomenon at the chimney outlet, and solves how to reduce the use of wet gas heaters. Desulfurization unit produces gypsum rain and total aerosol

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