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Flue gas desulfurization and denitrification system and use method thereof

A technology for desulfurization and denitrification and flue gas, which is applied in the field of flue gas desulfurization and denitrification systems, can solve the problems that cannot be removed, and achieve the effect of repeated desulfurization and denitrification, prolonging the contact time, and high efficiency of the method

Pending Publication Date: 2021-04-30
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the removal rates of NO and SO were 30% and 18% respectively when pulsed corona discharge was used alone. 2 cannot be efficiently removed

Method used

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  • Flue gas desulfurization and denitrification system and use method thereof
  • Flue gas desulfurization and denitrification system and use method thereof
  • Flue gas desulfurization and denitrification system and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 , figure 2 As shown, a flue gas desulfurization and denitrification system, the flue gas desulfurization and denitrification system includes a flue gas input pipe 1, an additive generator 2, a dielectric barrier coupling positive pulse corona discharge device 3, an absorption tower 4 and a connecting pipe 5, and the flue gas input The pipe 1 is connected to the additive generator 2, the additive generator 2, the dielectric barrier coupling positive pulse corona discharge device 3 and the absorption tower 4 are sequentially connected through the connecting pipe 5, the dielectric barrier coupling positive pulse corona discharge device 3 includes a quartz reactor 31 , the discharge needle beam 32 and the metal sheath 33 surrounding the outer wall of the quartz reactor 31, the discharge needle beam 32 is fixed in the center of the quartz reactor 31, and the tip of the discharge needle beam 32 is located in the middle of the metal sheath 33.

[0030] Such ...

Embodiment 2

[0036] On the basis of Example 1, using O 2 The volume content is 8%, the initial concentration of NO is 500ppm, and the SO 2 Mixed gas with an initial concentration of 1000ppm is used as flue gas, 0.5% by volume of methanol vapor is added as an additive, and 0.15mol / LNa is used 2 S 2 o 8 The solution is a wet oxidant, the temperature of the reaction solution is 50°C, the gas velocity is 600mL / min, and the discharge current is 2.5A to remove NO and SO from the flue gas. 2 experiment.

[0037] Nitrogen was used as the carrier gas, and the experiment was carried out under normal pressure. Each parallel experiment was carried out for 20 minutes, and the average value was obtained by repeating three times. NO, SO 2 The removal rate is calculated according to this formula: where C in and C out Respectively, the stable concentration of NO measured by the flue gas analyzer before and after the reaction, the measured NO removal rate was 98.9%, and the SO 2 The removal rate...

Embodiment 3

[0039] On the basis of Example 1, using CO 2 The volume content is 12%, O 2 The volume content is 8%, the initial concentration of NO is 500ppm, and the SO 2 Mixed gas with an initial concentration of 1000ppm is used as flue gas, 0.5% by volume of methanol vapor is added as an additive, and 0.15mol / L Na 2 S 2 o 8 The solution is a wet oxidant, the temperature of the reaction solution is 50°C, the gas velocity is 600mL / min, and the discharge current is 1.67A to remove NO and SO from the flue gas. 2 experiment.

[0040] Nitrogen was used as the carrier gas, and the experiment was carried out under normal pressure. Each parallel experiment was carried out for 20 minutes, and the average value was obtained by repeating three times. NO, SO 2 The removal rate is calculated according to this formula: where C in and C out They are the stable concentration of NO measured by the flue gas analyzer before and after the reaction, and the NO removal rate was measured to be 96.9%...

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Abstract

The invention discloses a flue gas desulfurization and denitrification system and a use method thereof, and relates to the technical field of air pollution control, the flue gas desulfurization and denitrification system comprises an air inlet pipe, an additive generator, a dielectric barrier coupling positive pulse corona discharge device, an absorption tower, an exhaust pipe and connecting pipes. The air inlet pipe is connected with the additive generator, the additive generator, the dielectric barrier coupling positive pulse corona discharge device and the absorption tower are sequentially connected through connecting pipes, and the exhaust pipe is connected with the absorption tower. The simultaneous desulfurization and denitrification method is efficient, does not need a catalyst, can be carried out under normal pressure, eliminates adverse effects of O2, CO2 and H2O in actual flue gas on NTP method denitrification, is high in desulfurization efficiency, is not easy to cause secondary pollution, and enables NO and SO2 to be efficiently removed at the same time. The invention is accepted by basic scientific research business cost subsidy (project number XDJK2020C077) of central colleges and universities in 2020 and experimental technology research project subsidy (project number SYJ2020025) of southwest universities in 2020.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to a flue gas desulfurization and denitrification system and a use method thereof. Background technique [0002] SO emissions from coal combustion 2 and NO X It is the main substance causing air pollution in my country, accounting for about 2 and NO X 90% and 67% of total emissions. SO 2 , NO X It can cause many serious environmental problems such as acid rain, photochemical smog, urban fine particle pollution, smog, and ozone depletion, and it will also endanger people's health. So, raise SO 2 , NO X Removal rates are necessary to meet increasingly stringent environmental protection regulations. [0003] The integrated technology of desulfurization and denitrification is still immature, and most new technologies are in the stage of laboratory development and pilot test, and not many have reached the scale of industrial application. The traditional flue gas s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/32B01D53/78B01D53/60
CPCB01D53/323B01D53/78B01D53/60B01D2258/0283B01D2251/10
Inventor 杨岚朱瀚昆罗小英赵亚囡张红菊
Owner SOUTHWEST UNIVERSITY
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