Study On Purifying SO₂ With Modified Glass Fiber Filter For Air Conditioning

TiO₂ photocatalytic oxidation technology has the characteristics of high catalytic efficiency, strong oxidation, small environmental pollution, mild reaction conditions, low price, and so on. It has become a kind of environment friendly technology, which has a very wide application potential in air treatment. In this paper, in light of the problems of the system complexity and low light utilization efficiency of the traditional TiO₂ photocatalytic technology,loading the TiO₂ on the surface of glass fiber filter material, and thus the glass fiber load of TiO₂ Photocatalytic Functional air filter material.On the basis of the research of nano TiO₂/glass fiber filter for low concentration of SO₂ purification effect.Nano TiO₂ sol was prepared by sol-gel method. The surface of glass fiber filter material（F5, F6, F7） was loaded into the air conditioner by impregnation method,The nano TiO₂ particle size was tested. Showing that the particle size of the particles was 75%; XRD analysis was carried out, and the crystal diffraction peak sharpness of the pattern was better than that of the TiO₂ crystal, and the results showed that the crystal grain was complete and had higher photocatalytic activity; The TiO₂/ glass fiber filter material was observed by electron microscope.and showed that the surface of the nano TiO₂ was granular distribution.The performance of nano TiO₂ modified glass fiber was tested by static and dynamic experiments, and the results are as follows:Tested different glass fiber filter material in static experiment under different conditions in closed small indoor purification effect of SO₂, the results are as follows:1) TiO₂ in the surface of the glass fiber filter material load three times, the catalyst showed higher activity, the purification efficiency of SO₂ at the time of 1 and 5 times higher than the load efficiency. 2) "F5T/purple" purification efficiency of SO₂ was48%, far higher than "F5" and "F5T" on the purification efficiency of SO₂, namely under the light irradiation, nanometer TiO₂ show higher activity, to increase the purification efficiency of SO₂. 3) "F5T/purple", "F6T/purple", "F7T/purple" on the purification efficiency of SO₂ were 48%, 59%, 65%, the higher the visible filter specifications, the higher the degree of purification of SO₂.Tested different glass fiber filter material in dynamic experiment in different conditions for the purification effect of SO₂, the results are as follows: 1) theF5T/purple on the purification efficiency of SO₂ than "F5T" increased by 22%,25% higher than that of "F5"; 2) within the scope of the 22 ℃ 28 ℃, the higher the temperature, SO₂ purification efficiency is higher; 3) with the increase of wind speed, "F5T/purple", "F6T/purple", "F7T/purple" is first to SO₂ purification rate,lower, after wind at best "F5T/purple", "F6T/purple", "F7T/purple" on the highest purification rate of SO₂ is respectively: 32%, 37%, 43%. 4) in the experimental range of filtration velocity, filtration material before and after the modification of a parabolic resistance with the change of wind speed. The greater the material level, the greater the filtration resistance; And with the increasing of wind velocity, filtration resistance is becoming more and more big.