Device and technology for wet desulfurization and denitrification of flue gas of coal-fired boiler and treatment of wastewater
A technology for wet desulfurization and wastewater treatment, which is applied in gas treatment, separation methods, air quality improvement, etc., and can solve problems such as flammable flue, gypsum quality impact, and treatment
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[0123] Example 1
[0124] A coal-fired boiler flue gas volume 59723m3 / h, NOx349mg / Nm 3 , SO 2 1501mg / Nm 3 After the initial flue gas enters the wet desulfurization and denitrification and wastewater treatment process, the liquid-to-gas ratio of wastewater to flue gas in the wastewater evaporation and cooling section is 0.02L / m 3 The rapping period of the demister is 30s, and the atomization particle size D50 is 60μm; the molar ratio of ozone injected into the flue gas in the oxidation section to nitrogen oxide in the flue gas is n O3 : N NO =2.5; the supergravity level of the supergravity device in the supergravity absorption section is 500, and the liquid-gas ratio is 5L / m 3 , The pH value of the desulfurization and denitrification absorbent circulating tank is 8; in the wastewater oxidation and denitrification section, the amount of sulfite substances and the oxidation air volume are 3mol / m 3 ,Added denitrification agent n Sulfamic acid : N Nitrite = 2.0. Export NOx9mg / Nm after...
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[0125] Example 2
[0126] A coal-fired boiler flue gas volume is 61723m3 / h, NOx365mg / Nm 3 , SO 2 1461mg / Nm 3 After the initial flue gas enters the wet desulfurization and denitrification and wastewater treatment processes, the liquid-to-gas ratio of wastewater to flue gas in the wastewater evaporation cooling section is 0.01L / m 3 , The rapping period of the demister is 130s, and the atomization particle size D50 is 120μm; the molar ratio of ozone injected into the flue gas in the oxidation section to nitrogen oxide in the flue gas is n O3 : N NO =1.5; The supergravity level of the supergravity device in the supergravity absorption section is 300, and the liquid-to-air ratio is 4L / m 3 , The pH value of the desulfurization and denitration absorbent circulating tank is 7; in the wastewater oxidation and denitrification section, the amount of sulfite substances and the oxidation air volume are 6mol / m 3 ,Added denitrification agent n Sulfamic acid : N Nitrite = 1.5. After this process...
Example Embodiment
[0127] Example 3
[0128] A coal-fired boiler flue gas volume 57723m3 / h, NOx333mg / Nm 3 , SO 2 1601mg / Nm 3 After the initial flue gas enters the wet desulfurization and denitrification and wastewater treatment processes, the liquid-to-gas ratio of wastewater to flue gas in the wastewater evaporation and cooling section is 0.015L / m 3 , The rapping period of the demister is 200s, and the atomization particle size D50 is 300μm; the molar ratio of ozone injected into the flue gas in the oxidation section to nitrogen oxide in the flue gas is n O3 : N NO =1.0; the supergravity level of the supergravity device in the supergravity absorption section is 100, and the liquid-to-air ratio is 8L / m 3 , The pH value of the desulfurization and denitrification absorbent circulating tank is 4; in the wastewater oxidation and denitrification section, the amount of sulfite substances and the oxidation air volume are 3mol / m 3 ,Added denitrification agent n Sulfamic acid : N Nitrite = 1.0. Export NOx11...
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