Preparation method of spherical filtering material for eliminating sulfur dioxide and mouth and nose mask using filtering material

Abstract

The invention discloses a spherical filtering material for eliminating sulfur dioxide and also relates to a mouth and nose mask formed by using the filtering material. A preparation method comprises the following steps of (a) uniformly mixing kaolin, active coke, 5A zeolite and modified fly ash according to a weight ratio of (75 to 200):(90 to 180):(135 to 360):(60 to 170) to obtain a mixture; (b)rolling the mixed raw materials obtained in the step (a) into balls under the water adding wetting conditions; performing drying firing solidification to become spherical filtering materials with certain intensity and adsorption performance. Under the cooperated effects of the raw materials, a specific pelletizing process is matched, so that the adsorption area and shaping intensity of the spherical filtering materials reach the optimum; the prepared spherical filtering material has a high removal rate on sulfur dioxide in air; the filtering material is used in the mouth and nose mask, and achieves strong adsorption performance and good ventilation performance.

Description

technical field [0001] The invention relates to the field of air purification, and relates to a method for preparing a spherical filter material for sulfur dioxide removal and a mouth and nose mask using the filter material. Background technique [0002] my country's energy consumption structure is dominated by coal, which accounts for about 75% of primary energy. Among them, direct combustion is the main way of coal utilization, and the SO produced by coal combustion 2 Exhaust gas has become the main source of air pollution in our country, causing the pollution in our cities to be mainly soot-type pollution. At present, my country's total annual emission of sulfur dioxide has greatly exceeded the self-purification capacity of the environment. [0003] SO 2 Is a colorless irritating gas, the main way to invade the human body is breathing. After being stimulated by sulfur dioxide, people may have a series of symptoms such as coughing, sneezing, sore throat, chest tightnes...

AI Technical Summary

Problems solved by technology

[0004] The development and selection of flue gas purification technology should be considered from multiple perspectives such as economy, technology and environment: less investment, easy to obtain raw materials, low price and low consumption; the traditional lime / limestone gypsum method has the disadvantages of large investment, high operating costs, The process is complex, requires water and consumes a lot of water, and the desulfurization residue is CaSO 4 And a small amount of dust, low utilization value and easy to cause secondary pollution, etc., not suitable for popularization and application in our country

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