Horizontal annular wet flue gas desulfurization device and method

Abstract

The invention discloses a horizontal annular wet flue gas desulfurization device and method. In the horizontal annular wet flue gas desulfurization device, a desulfurization device body is of a hollowtubular structure, one end of the desulfurization device body is a flue gas inlet, the other end of the desulfurization device body is a purified flue gas outlet, an annular shape is defined by the desulfurization device body from the flue gas inlet to the purified flue gas outlet, a demister is arranged in the purified flue gas outlet, a slurry distribution main pipe is arranged in the desulfurization device body and distributed in the length direction of the desulfurization device body, an inlet of a slurry circulating pump is connected with a slurry pool, and an outlet of the slurry circulating pump is connected with the slurry distribution main pipe. According to the invention, the vertical flow direction of flue gas in a conventional wet flue gas desulfurization device is changed into the horizontal flow direction, the slurry supply height is reduced, and the power required by the slurry circulating pump is remarkably reduced. An annular structure is adopted, a flue gas through-flow path is prolonged, the desulfurization reaction time is prolonged, internal components of the device are simple, flue gas flowing is facilitated, and the output requirement of a desulfurization booster fan is reduced.

Description

technical field [0001] The invention relates to a wet flue gas desulfurization device, in particular to a horizontal annular wet flue gas desulfurization device and method. Background technique [0002] Wet flue gas desulfurization process is a coal-fired flue gas desulfurization method widely used in thermal power generation and other fields. This process generally uses limestone as the desulfurization absorbent, and the limestone is crushed and ground into powder and mixed with water to make absorbent slurry. The conventional wet flue gas desulfurization device adopts the form of a desulfurization tower, and the flue gas enters from the middle of the desulfurization tower, passes through the internal parts of the tower, and is discharged from the top. The bottom of the desulfurization tower is the desulfurization absorbent slurry pool, and the slurry circulation pump is arranged around the tower. The slurry circulation pump pumps the slurry from the bottom of the tower to...

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Problems solved by technology

Although the above methods can achieve the expected purpose, they all increase the internal components of the tower, which increases the flow resistance of the flue gas, and requires the fan output to be upgraded, which further increases the energy consumption.

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