Desulfurization wastewater treatment device and treatment method thereof
A desulfurization wastewater and treatment device technology, which is applied in the direction of gaseous effluent wastewater treatment, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of insufficient separation of desulfurization wastewater, reduce the failure rate, and save energy Effect
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Embodiment 1
[0041] A desulfurization wastewater treatment device, in which a parallel flue 4 is installed in parallel with the inlet flue of the air preheater 14 for independently heating the desulfurization wastewater; an atomizing nozzle 3 and a sewage pump are installed in the inlet section of the parallel flue 4 5. The atomizing nozzle 3 and the sewage pump 5 are connected through the sewage pipe; the outlet of the parallel flue 4 is connected to the outlet flue 13 of the air preheater, and the low temperature economizer 8 is installed at the outlet flue 13 of the air preheater. 8 The outlet is connected to the electrostatic precipitator 9 through the flue; the air heater 11 is installed at the primary air and secondary air ducts of the air preheater 14 inlet.
[0042] Use low-temperature economizer 8 to reduce the flue gas temperature in front of electrostatic precipitator 9, usually the flue gas temperature is higher than 125°C, use low-temperature economizer 8 to reduce the flue gas...
Embodiment 2
[0047] This embodiment is basically the same as Embodiment 1, except that the desulfurization wastewater treatment device described in this embodiment is also equipped with a flue gas baffle 7 at the outlet of the parallel flue 4 to regulate the amount of smoke entering the parallel flue 4. Gas volume; after the evaporation section of the parallel flue 4, a high-temperature waste heat exchanger 6 is installed to further recycle the temperature of the flue gas in the parallel flue 4.
[0048] The amount of flue gas introduced into the parallel flue 4 for treating desulfurization wastewater is 20% of the total flue gas amount of the boiler, and the flue gas temperature is 380°C.
[0049] The desulfurization wastewater or concentrated wastewater is sprayed into the parallel flue 4 through the sewage pump 5, the sewage pipe and the atomizing nozzle 3, and the particle size of the droplets is 420 microns. The residence time of the flue gas in the parallel flue 4 is 1.2s. The flue g...
Embodiment 3
[0051] This embodiment is basically the same as Embodiment 2, the difference is:
[0052] The amount of flue gas introduced into the parallel flue 4 for treating desulfurization wastewater is 15% of the total flue gas amount of the boiler, and the flue gas temperature is 450°C.
[0053] The desulfurization wastewater or concentrated wastewater is sprayed into the parallel flue 4 through the sewage pump 5, the sewage pipe and the atomizing nozzle 3, and the particle size of the droplets is 280 microns. The residence time of the flue gas in the parallel flue 4 is 0.9s, and then enters the high-temperature waste heat exchanger 6 to realize the complete evaporation of the desulfurization wastewater after atomization.
[0054] The invention uses the hot water produced by the low-temperature economizer in front of the electrostatic precipitator to heat the primary air and secondary air of the boiler, thereby reducing the coal consumption of the boiler; The amount of hot flue gas is...
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