High-precision high temperature and corrosion resisting nanometer filter cloth with adsorption and decomposition functions and making method thereof

Abstract

The invention discloses high-precision high temperature and corrosion resisting nanometer filter cloth with adsorption and decomposition functions and a making method thereof. The filter cloth comprises a middle base cloth layer, wherein a superfine fiber dust-facing surface layer is arranged on the upper surface of the base cloth layer, an air transmitting and purifying surface layer is arranged on the lower surface of the base cloth layer, the superfine fiber dust-facing surface layer is formed by laying nanometer activated carbon fibers and polytetrafluoroethylene superfine fibers into a net, the base cloth layer, the superfine fiber dust-facing surface layer and the air transmitting and purifying surface layer are needled into felt, and a PTFE emulsion dipping layer is arranged on the surface of the felt. The filter cloth has the advantages that the nanometer activated carbon fibers and a polytetrafluoroethylene base material are used for making the filter cloth, and the filter cloth has a microcellular structure, can adsorb and decompose harmful gases and is high in filtering precision; meanwhile, according to the making method, by means of the dipping treatment process, the surface of the filter cloth has certain hydrophobicity, and the resistance to acid, alkali and corrosion of the filter cloth is improved.

Description

technical field [0001] The invention relates to the field of waste gas treatment, in particular to a needle felt dust-removing filter cloth and a preparation method thereof. Background technique [0002] Municipal waste has become a major problem affecting the environment and human health, and its treatment is mostly completed by incineration and bag-type dust removal technology. However, due to the complex composition of garbage, a large amount of harmful gases such as heavy metals, dioxins, SO2, HCl, and HF will be produced after incineration. Among them, dioxin is known as the "poison of the century", and one ten thousandth or even one ten thousandth of a gram can cause serious harm to human health. [0003] At present, PTFE needle-punched felt-coated filter cloth is commonly used, which has been vigorously promoted and used in waste incineration, biomass boilers and other dust removal devices, and the emission concentration can also reach the requirement of 10mg / Nm3. H...

AI Technical Summary

Problems solved by technology

However, it cannot effectively remove the peculiar smell and dioxin substances contained in the flue gas, so it is necessary to install an activated carbon reactor in front of the bag filter

This not only increases the cost of dust removal, but also some dioxin escapes from the bag filter and pollutes the atmosphere; PTFE needle-punched felt-coated filter bags must be uniformly coated with glue during the sewing process, Otherwise, it is difficult to ensure the requirement of less than 10mg / Nm3 or even lower; in addition, the PTFE membrane is easy to break and fail, which not only makes the emission concentration exceed the standard instantly, but also increases the cost of dust removal for enterprises

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