Flue gas desulfurizing tower and flue gas desulfurization and wastewater treatment method

Abstract

The invention discloses a flue gas desulfurizing tower and a flue gas desulfurization and wastewater treatment method. The flue gas desulfurizing tower sequentially comprises a flue gas exhaust 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 partitionplate II from the top part of the circulation clear liquid area; the oxidation flocculation area is provided with a stirring device; 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 greatlyreduced, and 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 a flue gas desulfurization and wastewater treatment method. Background technique [0002] Sulfur dioxide and dust are contained in boiler flue gas and flue gas emitted by factories. Sulfur dioxide and dust are the main components of air pollutants. one. [0003] Wet desulfurization has the advantages of high desulfurization rate, reliable device operation, and simple operation. Therefore, the existing flue gas desulfurization technologies in various countries in the world are mainly based on wet desulfurization. Traditional wet desulfurization technologies mainly include limestone-gypsum desulfurization, double alkali desulfurization, sodium alkali desulfurization, ammonia desulfurization and so on. The above-mentioned flue gas desulfurization technology mainly adopts countercurrent spraying. The alkaline slurry is sprayed from...

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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 devices and boilers are due to lack of There is not enough space to upgrade and renovate, resulting in smoke emission indicators that cannot meet the current national standards and forced to stop work or demolish and rebuild

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