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Multifunctional composite gas purification film material

A technology of composite gas and purification membrane, applied in the field of gas purification, can solve the problems of long gas purification process, poisoning of denitration catalysts, and high processing cost, and achieve the advantages of shortening the exhaust gas purification process, improving the efficiency of heat recovery and utilization, and reducing the size of the equipment. Effect

Active Publication Date: 2018-07-20
南京科赫科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional industrial flue gas purification process is to denitrate the flue gas at 315°C-400°C after passing through the heat exchanger, and then perform dust removal at 120-160°C after denitrification. The gas purification process is long, the system is complex, and the floor area is large. , the treatment cost is high, and the flue gas is not dedusted before denitrification, the alkali metal in the dust will poison the denitrification catalyst, reducing the denitrification efficiency and service life of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A multifunctional composite gas purification membrane material, including a membrane layer and a substrate. The membrane layer is a polytetrafluoroethylene biaxially stretched membrane. The substrate is made of a mixture of carrier fibers and low-temperature denitrification catalytic fibers. The carrier fiber accounts for 40wt%. , the carrier fiber is a mixed material of organic fiber and inorganic fiber, wherein the content of inorganic fiber accounts for 10wt%, the low-temperature denitrification catalytic fiber has a bead structure, the bead diameter is 0.1 μm, and the catalytic active component is TiO 2 The content is 20wt%, the Mn content is 15wt%, the Cr content is 3wt%, the V content is 20wt%, the Sn content is 1wt%, the Ce content is 0.5t%, and the Cu content is 0.5wt%.

[0017] The average pore diameter of the film layer is 0.5 μm, the thickness is 30 μm, and the porosity is 80-95%. The average pore diameter of the substrate is 30 μm, the thickness is 3mm, and t...

Embodiment 2

[0025] A multifunctional composite gas purification membrane material, including a membrane layer and a substrate. The membrane layer is a polytetrafluoroethylene biaxially stretched membrane. The substrate is made of a mixture of carrier fibers and low-temperature denitrification catalytic fibers. The carrier fiber accounts for 50 wt%. , the carrier fiber is a mixed material of organic fiber and inorganic fiber, wherein the content of inorganic fiber accounts for 20wt%, the low-temperature denitrification catalytic fiber has a bead structure, the bead diameter is 2 μm, and the catalytic active component is TiO 2 The content is 40wt%, the Mn content is 10wt%, the Cr content is 5wt%, the V content is 15wt%, the Sn content is 5wt%, the Ce content is 1.5wt%, and the Cu content is 1wt%.

[0026] The average pore diameter of the film layer is 10 μm, the thickness is 15 μm, and the porosity is 90%. The average pore diameter of the substrate is 15 μm, the thickness is 5mm, and the por...

Embodiment 3

[0034] A multi-functional composite gas purification membrane material, including a membrane layer and a substrate, the membrane layer is a polytetrafluoroethylene biaxially stretched membrane, the substrate is made of a mixture of carrier fibers and low-temperature denitration catalytic fibers, and the carrier fibers account for 70wt% , the carrier fiber is a mixed material of organic fiber and inorganic fiber, in which the content of inorganic fiber accounts for 30wt%, the low-temperature denitrification catalytic fiber has a bead structure, the bead diameter is 3 μm, and the catalytic active component is TiO 2 The content of Mn is 50wt%, the content of Mn is 5wt%, the content of Cr is 10wt%, the content of V is 10wt%, the content of Sn is 10wt%, the content of Ce is 2wt%, and the content of Cu is 2wt%.

[0035] The average pore size of the film layer is 15 μm, the thickness is 30 μm, and the porosity is 95%. The average pore size of the substrate is 30 μm, the thickness is 1...

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Abstract

The invention relates to a multifunctional composite gas purification film material, which comprises a film layer and a substrate, wherein the film layer is a polytetrafluoroethylene biaxial stretch film; the substrate is formed by mixing carrier fiber and low-temperature denitration catalysis fibers; the carrier fiber accounts for 40 to 70 weight percent and is a mixed material of organic fiber and inorganic fiber; the inorganic fiber accounts for 10 to 30 weight percent; the low-temperature denitration catalysis fiber has a bead particle structure; the bead particle diameter is 0.1 to 3 mum;the catalysis active ingredients comprises 20 to 50 weight percent of TiO2, 5 to 15 weight percent of Mn, 3 to 10 weight percent of Cr, 10 to 20 weight percent of V, 1 to 10 weight percent of Sn, 0.5to 2 weight percent of Ce and 0.5 to 2 weight percent of Cu. The dust removal and the denitration are performed at 120 to 160 DEG C; the dust removal and the denitration are coupled; the tail gas purification process is shortened; the dimension of the tail gas purification equipment is reduced; the heat recovery and utilization efficiency in the tail gas is improved.

Description

technical field [0001] The invention belongs to the technical field of gas purification, and in particular relates to a multifunctional composite gas purification membrane material with denitrification and dust removal functions. technical background [0002] At present, my country's atmospheric environmental situation is very severe, with frequent occurrence of large-scale haze weather, and air pollution characterized by fine particulate matter dust and nitrogen oxides has become increasingly prominent, causing great harm to human health and environmental quality. In recent years, people have done a lot of research work on gas dust removal and flue gas denitrification. Among the many gas dedusting technologies, the membrane dedusting technology has the advantages of high dust removal efficiency, small pressure drop loss and long service life, and has become the mainstream dedusting technology in the market. For the removal of nitrogen oxides, the current main methods are S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/36B01D69/12B01D46/54B01D53/90B01D53/56B01J23/889B01J35/06
CPCB01D46/543B01D53/8628B01D53/90B01D69/12B01D71/36B01J23/8892B01D2325/10B01J35/58
Inventor 罗玉湘
Owner 南京科赫科技有限公司
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