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Method and apparatus for optic catalytic oxidizing, desulfurizing and denitrifying flue gas simultaneously

A photocatalytic oxidation, desulfurization and denitrification technology, applied in the field of flue gas desulfurization and denitrification, can solve the problems of huge operating cost, non-recyclable, easy to block pores, etc., achieve low manufacturing cost, low consumption, and increase the effect of adsorption

Inactive Publication Date: 2006-10-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain a higher catalytic oxidation efficiency in this method, high-power ultraviolet radiation is required, which consumes a lot of energy.
And the desulfurization product of this method is CaSO 4 , insoluble in water, easy to block the pores, especially the catalyst TiO used in this method 2 (La 2 o 3 , CeO 2 ) can not be recycled, it can be expected that when this method is applied in actual engineering, the operating cost will be very huge

Method used

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  • Method and apparatus for optic catalytic oxidizing, desulfurizing and denitrifying flue gas simultaneously
  • Method and apparatus for optic catalytic oxidizing, desulfurizing and denitrifying flue gas simultaneously

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Prepare 0.1mol / L ammonium fluorotitanate ((NH 4 ) 2 TIF 6 ) And 0.3mol / L boric acid (H 3 BO 3 ) The mixed solution is a photocatalyst deposition solution, and 0.5% ZnO additive by mass is added to the deposition solution, deposited on the carrier quartz sand with a particle size of 4-6mm under the condition of a water bath at 40°C, and then taken out to dry after 45 hours. Raise the heating rate of 10℃ / min to 450℃ and burn for 30 minutes to obtain the supported TiO 2 catalyst of light. Catalytic reaction conditions: humidity is 3%, temperature is 70°C.

Embodiment 2

[0052] Prepare 0.1mol / L ammonium fluorotitanate ((NH 4 ) 2 TIF 6 ) And 0.3mol / L boric acid (H 3 BO 3 ) Photocatalyst deposition solution, and 0.5% Fe is added to the deposition solution 2 O 3 Additives are deposited on the carrier quartz sand with a particle size of 4-6mm under the condition of a water bath at 40°C. After 40 hours, they are taken out to dry, and heated at a rate of 10°C / min to 450°C for 30 minutes to obtain a supported type. TiO 2 catalyst of light. Catalytic reaction conditions: humidity is 10%, temperature is 60°C.

Embodiment 3

[0054] Prepare 0.1mol / L ammonium fluorotitanate (NH 4 ) 2 TIF 6 And 0.3mol / L boric acid H 3 BO 3 Photocatalyst deposition solution, and 0.5% Al is added to the deposition solution 2 O 3 Additives are deposited on the carrier quartz sand with a particle size of 4-6mm under the condition of a water bath at 40°C. After 45 hours, they are taken out to dry, and heated at a rate of 10°C / min to 450°C for 30 minutes to obtain a supported type. TiO 2 catalyst of light. Catalytic reaction conditions: humidity is 6%, temperature is 120°C.

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Abstract

The invention relates to a method for processing desulfuration and denitration simultaneously of smoke optical catalysis oxygenation and relative device, belonging to the smoke purifying technique. Said method comprises: guiding the coal-fired smoke into the reactor; filling optical catalyst into the reactor to be illuminated by light, while said optical catalyst is formed by carrier, and the titania and additive in 0.5% mass percentage; said carrier is quartz sand whose diameter is 4-6mm; said optical catalyst is the mixture of titania and the additive. The invention can complete the desulfuration and denitration simultaneously with high efficiency and stable operation, while it can apply the SO2 and NOx in different mass percentages, and the product can be used as muck; said desulfuration and denitration process will not generate pollution, with simple stricture and lower cost.

Description

Technical field [0001] The invention relates to a method and a device for desulfurization and denitration of flue gas, especially a carrier type TiO 2 The photocatalyst catalyzes and oxidizes flue gas to realize flue gas desulfurization and denitration, which belongs to the technical field of flue gas purification. Background technique [0002] SO produced during coal burning in power plants 2 And NO X It is currently one of the main sources of air pollution, and the environmental problems caused by it have attracted worldwide attention. Therefore, the research on flue gas desulfurization and denitrification technology has also become a research hotspot in the environmental field. [0003] The current industrial flue gas desulfurization methods can be divided into wet and dry processes. The traditional wet desulfurization process is the limestone-gypsum process. Although the process is very mature, the equipment investment and operating costs are relatively high, and a large amou...

Claims

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Application Information

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IPC IPC(8): B01D53/60B01D53/86B01J21/06
CPCY02A50/20
Inventor 赵毅赵莉韩静许勇毅
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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