Flue gas desulphurization apparatus and flue gas desulphurization method

Abstract

The invention provides a flue gas desulphurization apparatus, which comprises a flue capable of absorbing flue gas; a first channel and a second channel communicated with an outlet of the flue; a reaction tower; a first inlet of a tower body of the reaction tower arranged at outlet of the first channel, a second inlet of the tower body of the reaction tower arranged at outlet of the second channel, a first scrubber arranged on the first channel, performing desulphurization washing on the flue gas in the first channel from the flue, and spraying the high pressure gas-liquid mixing flow after washing from the first inlet; and a second scrubber arranged on the second channel, performing desulphurization washing on the flue gas in the second channel from the flue, and spraying the high pressure gas-liquid mixing flow after washing from the second inlet. The flue gas desulphurization apparatus can realize multitime desulphurization on flue gas, and flue gas desulphurization can be thoroughly completed.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a flue gas desulfurization device and a flue gas desulfurization method. Background technique [0002] The flue gas desulfurization device is a device for filtering and removing sulfur dioxide from the flue gas generated during the thermal power generation process and the working process of industrial furnaces. Filter and remove sulfur dioxide from flue gas; the use of flue gas desulfurization devices is of great significance for purifying air, controlling the formation of acid rain, and protecting the environment. [0003] At present, the commonly used desulfurization process is wet desulfurization process. The principle of the process is that the flue gas discharged from the flue is pressurized by the booster fan, cooled by the cooling device, and then enters the reaction tower for reaction and absorption. The sulfur dioxide in the flue gas is mixed with alkaline slu...

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Problems solved by technology

[0004] The inventor of the present invention found in the research process that the current flue gas desulfurization device has the following problems: the flue gas desulfurization device needs to be equipped with a booster fan and a water cooling device, etc., and the investment and maintenance costs are relatively high, resulting in relatively high cost of desulfurization of the flue gas. At the same time, the existing flue gas desulfurization device only sprays the absorbent that reacts with sulfur dioxide through the equipped lye spray device to achieve flue gas desulfurization. This single-stage desulfurization method has poor flue gas desulfurization effect

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