A multifunctional composite gas purification membrane material with denitrification and dust removal functions

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 specifically relates to a multifunctional composite gas purification membrane material with denitration and dust removal functions. [0002] technical background [0003] At present, my country's atmospheric environment is very severe, with frequent occurrence of large-scale smog and air pollution characterized by fine particulate dust and nitrogen oxides, which has caused great harm to human health and environmental quality. In recent years, a lot of research work has been done on gas dust removal and flue gas denitrification. Among the many gas dust removal technologies, membrane dust removal technology has the advantages of high dust removal efficiency, low pressure drop loss, and long service life, and has become the mainstream dust removal technology on the market. For nitrogen oxide removal, the current main methods are SCR and SNCR. The reaction temperature of SCR is 315-400℃, and t...

AI Technical Summary

Problems solved by technology

[0004] 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 have a poisonous effect on the denitrification catalyst, reducing the denitrification efficiency and service life of the catalyst