Preparation method of nano tourmaline modified dust removal filter material

Abstract

The invention discloses a preparation method of a nano tourmaline modified dust removal filter material, which belongs to the technical field of high-temperature smoke dust removal. The preparation method comprises the following steps: carrying out heat treatment for nano tourmaline powder; weighing sodium hexametaphosphate and sodium polyacrylate, and mixing the sodium hexametaphosphate and sodium polyacrylate with water; weighing nano tourmaline powder, adding water, and mixing with PTFE emulsion; adding the sodium hexametaphosphate and sodium polyacrylate into a mixed solution of the nano tourmaline powder and PTFE emulsion, and obtaining a nano tourmaline treatment solution; soaking a filter material test sample in the nano tourmaline treatment solution, and obtaining a nano tourmaline filter material; and polarizing the nano tourmaline filter material by virtue of electrets, and obtaining the nano tourmaline modified dust removal filter material. By adopting the preparation method, not only is electrets performance high, small dust can be trapped, the dust filter efficiency can be improved, the dust removing rate can be increased, and the equipment resistance is reduced.

Description

technical field [0001] The invention relates to a preparation method of dust removal filter material, in particular to a preparation method of nano tourmaline modified dust removal filter material, which belongs to the technical field of high temperature flue gas dust removal. Background technique [0002] As China's economy enters the era of heavy chemical industry, environmental pollution is becoming more and more serious, especially the PM2.5 inhalable fine particulate matter emitted by industry has the greatest impact on human health. It affects human respiratory system, immune function, cardiovascular system and central nervous system. Therefore, it is very important to reduce the emission of PM2.5 fine particles to protect the environment and protect people's physical and mental health. [0003] Under normal circumstances, conventional filter materials mainly rely on physical and mechanical barriers such as Brownian diffusion, interception, inertial collision, and grav...

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Problems solved by technology

[0003] Under normal circumstances, conventional filter materials mainly rely on physical and mechanical barriers such as Brownian diffusion, interception, inertial collision, and gravity sedimentation to filter particles in the air, so they are not ideal for filtering particles with small particle sizes, especially particles with a particle size of less than 5 μm. In order to achieve higher filtration efficiency, ordinary filter materials usually reduce the fiber diameter in the filter material, increase the gram weight, or weave the fabric more tightly, but the filter resistance of the material increases significantly, which increases the equipment resistance of the dust collector.

[0004] Electret treatment makes the fibers of the filter material charged. After the filter material is treated with electret, its filtration mechanism includes not only the original ordinary interception, but also electrostatic adsorption, so that it can be filtered without increasing the ventilation resistance. The filtration efficiency of the material has been significantly enhanced. At present, although there have been patent reports related to electret materials at home and abroad, the electret materials are mainly made of melt-blown materials through corona discharge and other methods. However, these electret materials The body material is only suitable for disposable products such as air purification and water treatment, and is not suitable for repeated use. Although there is a domestic patent report that tourmaline is loaded on the filter material, the tourmaline used in this patent has not been treated, which will make the filter After using the material for a period of time, it is not easy to clean the dust, and the resistance of the filter material increases, which increases the resistance of the equipment and affects the service life of the filter bag