Flue gas desulfurizing tower and flue gas dust removal, desulfurization and wastewater treatment method

Abstract

The invention discloses a flue gas desulfurizing tower and a flue gas dust removal, desulfurization and wastewater treatment method. The flue gas desulfurizing tower sequentially comprises a flue gasexhaust area, a demist area, a tower tray area, a spraying area and a wastewater treatment area from top to bottom; the flue gas exhaust area and the demist area are connected through a cone deformation diameter, the tower tray area and the spraying area are connected through an inverted cone deformation diameter; the wastewater treatment area is divided by a vertical partition plat I from the center into an oxidation flocculation area and a circulation clear liquid area, the circulation clear liquid area is completely separated from the oxidation flocculation area and the spraying area through a partition plate II from the top part of the circulation clear liquid area; and the vertical partition plate I is provided with a filter medium. The flue gas is subjected to dust removal, desulfurization and wastewater treatment in one tower, the flue gas is used to stir the wastewater to implement the operations of oxidation flocculation and concentration, the difference of the liquid levels of the two sides of the vertical partition plate is used as a driving force to filter the desulfurization wastewater, the occupied area is greatly reduced, the costs for the construction and transformation of the device and the operation cost of the device are obviously lowered.

Description

technical field [0001] The invention belongs to the field of industrial waste gas purification, and relates to a flue gas desulfurization tower and flue gas dust removal, desulfurization and wastewater treatment methods. Background technique [0002] Sulfur dioxide and dust are contained in the flue gas of coal-fired boilers and the regenerated flue gas of catalytic cracking catalysts. Sulfur dioxide and dust are the main components of air pollutants. Sulfur dioxide is the main cause of acid rain, and dust with smaller particle sizes is the smog One of the culprits. [0003] Environmental pollution is becoming more and more serious, smog incidents occur frequently, and the country pays more and more attention to environmental protection. In recent years, a series of environmental protection laws and regulations, national standards, and management methods have been issued. GB 13223-2011 "Emission Standard of Air Pollutants for Thermal Power Plants" stipulates: coal-fired boi...

AI Technical Summary

Problems solved by technology

The above-mentioned wet desulfurization technology includes flue gas desulfurization, desulfurization wastewater oxidation treatment or regeneration unit. The process is long, there are many equipments, and the floor area is large, which seriously restricts the construction and upgrading of dust removal and desulfurization devices. Some catalytic devices and coal-fired Boilers cannot be upgraded due to lack of sufficient space, resulting in smoke emission indicators that cannot meet the current national standards and have to be shut down or demolished and rebuilt

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