Composite filter material for cooperatively removing nitrogen oxides and dioxins, and preparation method thereof

A technology of nitrogen oxides and filter materials, applied in the field of functional composite filter materials, can solve the problems of large area occupied by factory flue gas treatment equipment and high treatment costs, and achieve the effect of improving wear resistance and prolonging service life

Inactive Publication Date: 2019-11-19
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the control of these pollutants generally adopts the method of separate removal, w

Method used

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  • Composite filter material for cooperatively removing nitrogen oxides and dioxins, and preparation method thereof
  • Composite filter material for cooperatively removing nitrogen oxides and dioxins, and preparation method thereof
  • Composite filter material for cooperatively removing nitrogen oxides and dioxins, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] a. Weigh 1g (1wt%) bis(diisooctylpyrophosphoryl) methyl glycolate titanate, 15g (15wt%) polyethylene glycol 400 and dissolve in 84g (84wt%) distilled water, add 4g capsules TiO with a diameter of 150-250μm 2 , CeO 2 and V 2 o 5 The mixture, wherein, the molar ratio of V and Ce is 1:1, TiO 2 The mass is V 2 o 5 -CeO 2 / TiO 2 90% of the total mass of the catalyst. After mixing, oscillate ultrasonically for 3 hours, and stir with a magnetic stirrer for 12 hours, so that the catalyst particles are uniformly dispersed in the emulsion, and emulsion a is obtained.

[0040]b. Pour the emulsion a into the container, the liquid level is 1mm, cut the filter material into a disc shape of 5cm, and dip it in the emulsion with the dust-facing side up, the liquid level is exactly half of the thickness of the filter material, dipping for 3 Take it out before the upper surface of the filter material becomes wet, dry it at 105°C for 4 hours, weigh it, and the mass of the filter m...

Embodiment 2

[0052] a. Weigh 0.2g (0.2wt%) bis(diisooctylpyrophosphoryl) methyl glycolate titanate, 10g (10wt%) polyethylene glycol 200 and dissolve in 89.8g (89.8wt%) distilled water , add 2g of TiO with a particle size of 150-250m 2 , CeO 2 and V 2 o 5 The mixture, wherein, the molar ratio of V and Ce is 1:1, TiO 2 The mass is 90% of the total mass of the catalyst system. After mixing, ultrasonically shake for 2 hours, and stir with a magnetic stirrer for 11 hours, so that the catalyst particles are uniformly dispersed in the emulsion.

[0053] b. Pour the emulsion into the container, the liquid level is 1mm, cut the filter material into a disc shape of 5cm, and immerse it in the emulsion with the dust side up, the liquid level is exactly half of the thickness of the filter material, and soak for 3 minutes , before the upper surface of the filter material is wet, take it out, dry it at 105°C for 4 hours, weigh it, and the mass of the filter material increases by 0.6108g. Immerse th...

Embodiment 3

[0060] a. Weigh 0.2g (0.2wt%) bis(diisooctylpyrophosphoryl) methyl glycolate titanate, 8g (10wt%) polyethylene glycol 600 and dissolve in 91.8g (91.8wt%) distilled water , add 2g of TiO with a particle size of 150-250μm 2 , CeO 2 and V 2 o 5 The mixture, wherein, the molar ratio of V and Ce is 1:1, TiO 2 The mass is 90% of the total mass of the catalyst system. After mixing, ultrasonically vibrate for 2 hours, and stir with a magnetic stirrer for 10 hours, so that the catalyst particles are uniformly dispersed in the emulsion.

[0061] b. Pour the emulsion into the container, the liquid level is 1mm, cut the filter material into a disc shape of 5cm, and immerse it in the emulsion with the dust side up, the liquid level is exactly half of the thickness of the filter material, and soak for 3 minutes , take it out before the upper surface of the filter material gets wet, dry it at 105°C for 4 hours, weigh it, the mass of the filter material increases by 1.4340g, and the calc...

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Abstract

The invention provides a composite filter material for cooperatively removing nitrogen oxides and dioxins, and a preparation method thereof, and belongs to the field of composite filter materials. Thepurpose of the invention is to remove dusts in flue gas and simultaneously remove NOx and dioxins in the flue gas. The method concretely comprises the following steps: impregnating a template agent mixed with vanadium, cerium and titanium oxides at the gas outlet side of a filter material, carrying out suction filtration on the dust-facing side of the filter material to load a NOx catalyst, and performing drying to remove the template in order to obtain the composite filter material. The filter material prepared by the method effectively avoids NH3 from affecting the catalytic oxidation of dioxins, has a long service life, and has a good pollutant removal effect.

Description

technical field [0001] The invention relates to a functional composite filter material, in particular to a composite filter material with the function of synergistically removing nitrogen oxides and dioxins and a preparation method thereof. Background technique [0002] NOx is one of the main sources of air pollution, which is harmful to human health and the ecological environment. NO is irritating to human eyes and respiratory system and induces cancer; NO is oxidized into NO in the air 2 , react with ultraviolet rays to form photochemical smog; a large number of nitrogen oxides dissolve in rain and snow to form nitric acid rain, which erodes crops and buildings. Dioxin is a general term for two types of tricyclic aromatic organic compounds, and it is the substance with the most carcinogenic potential discovered so far. Excessive intake of human body produces irreversible "three causes" effects of teratogenicity, carcinogenicity and mutagenicity. [0003] As the waste in...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01D53/86B01D53/56B01D53/70B01J35/10
CPCB01D53/8628B01D53/8662B01D2255/9022B01D2257/2064B01J23/002B01J23/34B01J35/10B01J2523/00B01J2523/72B01J2523/55B01J2523/3712B01J2523/47
Inventor 徐海涛支晓欢徐天平梅超强沈强
Owner NANJING UNIV OF TECH
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