Combined removal device and method for sulphur, mercury and nitrate in smoke
A combined removal and flue gas technology, applied in the combined removal of nitrate, sulfur in flue gas, and mercury fields, can solve the problems of mercury elements not being recycled, high cost, and weakened economy, so as to reduce investment costs, The effect of reducing consumption and reducing operating costs
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Embodiment 1
[0038] Tower body part: This part removes the pollutants in the flue gas in two layers. The dust from the dust collector contains SO 2 , NO, NO 2 , Hg 2+ (g) and Hg 0 (g) The flue gas at 90-120°C enters the lower layer of the tower body from the flue gas inlet 1, and the desulfurizer slurry in the desulfurizer slurry pool 2 is controlled by the first pH value online monitoring feedback adjustment device 18 to control the pH at 5.8-6.2 In between, the desulfurizer slurry is adjusted by the flow control valve 3, and is transported to the desulfurizer slurry spray pipe 5 by the desulfurizer slurry circulation pump 4-1, and is sprayed upward by the desulfurizer slurry spray pipe 5 to form a liquid curtain. Contact with the liquid curtain to generate mass transfer and reaction to remove SO in flue gas 2 , NO 2 and Hg 2+ (g). Contains NO and Hg at this time 0 The flue gas of (g) continues to go up, turns a bend in the space between the oxidant slurry tank 6 and the oxidant s...
Embodiment 2
[0070] In the first electrolytic cell 13 or the second electrolytic cell 14 in Example 1, the oxidant slurry in the upper layer of the tower body oxidizes NO and Hg 0 At the same time as (g), it is in a state of continuous energization and electrolysis. The working process of this embodiment is similar to that of Embodiment 1, and the difference from Embodiment 1 is that Hg in the flue gas 0 (g) When the concentration is low, the first electrolytic cell 13 or the second electrolytic cell 14 is not energized and electrolyzed until the Hg in the oxidant slurry is 2+ (l) After accumulating to a certain concentration, then electrify and desorb Hg 0 (l), which can save power consumption compared with continuous energization of electrolysis.
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