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Photolytic peroxide up and down counter spray atomizing bed desulfurization and denitrification method

A peroxide, desulfurization and denitrification technology, which is applied in the direction of chemical instruments and methods, separation methods, and dispersed particle separation, can solve the problems of large footprint, complex system, and increased initial investment and operating costs, and achieve high-efficiency removal , the effect of broad application prospects

Active Publication Date: 2015-08-05
常熟市董浜科技创业投资发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two methods can desulfurize and denitrify independently, they cannot achieve simultaneous desulfurization and denitrification in a spray bed.
Although the superimposed use of the two processes can achieve simultaneous desulfurization and denitrification, the whole system is complicated, occupies a large area, and has high investment and operating costs.
In addition, with the continuous improvement of human requirements for environmental protection, laws and regulations for the control of mercury emissions in flue gas have gradually been introduced, but currently there is no economical and effective flue gas mercury removal technology that has achieved large-scale commercial application
If a separate flue gas mercury removal system is added at the end of the existing desulfurization and denitrification system, it will inevitably cause a further increase in the initial investment and operating costs of the entire system, and ultimately it will be difficult to obtain large-scale commercial applications in developing countries

Method used

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  • Photolytic peroxide up and down counter spray atomizing bed desulfurization and denitrification method
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  • Photolytic peroxide up and down counter spray atomizing bed desulfurization and denitrification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1. SO in flue gas 2 ﹑The NO concentration is 3000ppm and 400ppm respectively, the flue gas inlet temperature of the upper and lower opposite spray bed is 55℃, and the liquid-gas ratio is 1.0L / m 3 , the concentration of hydrogen peroxide is 1.0mol / L, the pH of the solution is 3.5, the temperature of the solution is 50°C, and the effective radiation intensity of ultraviolet light is 40μW / cm 2 , The effective wavelength of ultraviolet light is 254nm. The results of the small test are: SO in flue gas 2 The simultaneous removal efficiencies of NO and NO can reach 100% and 70.2%, respectively.

Embodiment 2

[0047] Example 2. SO in flue gas 2 ﹑The NO concentration is 3000ppm and 400ppm respectively, the flue gas inlet temperature of the upper and lower opposite spray bed is 55℃, and the liquid-gas ratio is 1.0L / m 3 , the concentration of ammonium persulfate is 1.0mol / L, the pH of the solution is 3.5, the temperature of the solution is 50°C, and the effective radiation intensity of ultraviolet light is 40μW / cm 2 , The effective wavelength of ultraviolet light is 254nm. The results of the small test are: SO in flue gas 2 The simultaneous removal efficiencies of NO and NO can reach 100% and 67.4%, respectively.

Embodiment 3

[0048] Example 3. SO in flue gas 2 ﹑The NO concentration is 3000ppm and 400ppm respectively, the flue gas inlet temperature of the upper and lower opposite spray bed is 55℃, and the liquid-gas ratio is 1.0L / m 3 , the concentration of hydrogen peroxide is 1.5mol / L, the pH of the solution is 3.5, the temperature of the solution is 50°C, and the effective radiation intensity of ultraviolet light is 40μW / cm 2 , The effective wavelength of ultraviolet light is 254nm. The results of the small test are: SO in flue gas 2 The simultaneous removal efficiencies of NO and NO can reach 100% and 79.9%, respectively.

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Abstract

The invention relates to a photolytic peroxide up and down counter spray atomizing bed desulfurization and denitrification method. The method mainly comprises an emission source, a fan, a dust remover, a gas cooler, an up and down counter spray atomizing bed, a circulating pump I, a circulating pump II, a filling layer, an ultraviolet tube, atomizing nozzles, a demister, a liquid storage tank and a product after-processing system. SO2 and NO from the emission source react with sulfate radicals and hydroxyl radicals generated by decomposing peroxides through ultraviolet to produce sulfuric acid and nitric acid solutions applicable to resource utilization. The photolytic peroxide up and down counter spray atomizing bed desulfurization and denitrification method can effectively remove the SO2 and NO in flue gas and avoid secondary pollution during removal, and achieve a novel flue gas purification system having a broad application prospect.

Description

technical field [0001] The invention relates to the field of air pollution control, in particular to a method for desulfurization and denitrification of a photolytic peroxide spray bed up and down. Background technique [0002] SO produced during combustion 2 ﹑NO x And Hg can cause acid rain, photochemical smog and carcinogenic and other serious air pollution problems, endangering human health and ecological balance. In the past few decades, although people have developed a large number of flue gas desulfurization, denitrification and demercury technologies, the existing desulfurization, denitrification and demercuration technologies only aimed at the removal of a single pollutant at the beginning of research and development, and could not achieve multi-pollutant removal. removed at the same time. [0003] For example, the currently widely used flue gas desulfurization and denitrification technologies are mainly limestone-gypsum wet flue gas desulfurization technology and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/76B01D53/78B01D53/60B01D53/73
CPCY02A50/20
Inventor 刘杨先王燕张军张永春
Owner 常熟市董浜科技创业投资发展有限公司
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