A kind of high performance filter felt and its preparation method
A filter felt and functional technology, applied in the field of high-performance filter felt and its preparation, can solve the problems of reducing the service life of the filter material, affecting the strength of the filter material, complicated installation process, etc., and achieving long service life, low cost and high denitration efficiency. Effect
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Embodiment 1
[0044] Preparation of catalyst solvent: Prepare manganese nitrate solution and appropriate amount of deionized water to form 300ml manganese nitrate aqueous solution, and then prepare ammonium carbonate and appropriate amount of deionized water to form 300ml ammonium carbonate aqueous solution. Precipitation reaction began to take place in the ammonium carbonate aqueous solution, and stopped adding until the pH reached 8.5. At this time, the reaction time was 10 minutes, and then the suspension was aged for 2 hours to filter the precipitate, and the filter cake was washed several times with deionized water until When the pH of the filtrate reaches 7, the filter cake is dried in an oven at 120°C for 12 hours, then pulverized and ground to a particle size above 100 mesh, and the dried powder is placed in a beaker for later use. Take cobalt nitrate, cerium nitrate, and zinc nitrate, add some deionized water to fully stir and dissolve until the solution is clear, and configure it a...
Embodiment 2
[0048] The preparation of the catalyst solvent and the preparation of the filter felt is the same as in Example 1. The catalyst solvent prepared in Example 1 is evenly coated on the surface of the filter felt, then dried in a water bath, and dried in air at 60°C for 4 hours, and finally obtained Gram weight is 660g / m ２ High performance filter felt. The air permeability of the high-performance filter felt is measured to be 15.0cc / cm 2 / sec, the tensile strength in warp direction is 780N / 5cm, the tensile strength in weft direction is 1550N / 5cm, the collection efficiency of VDI3926 is 99.9886%, and the loading capacity of denitrification catalyst is 50mg / cm 2 , the temperature is lower than 190°C, and the filtration wind speed is 0.8-1.5m / min, the removal efficiency of the filter felt for nitrogen oxides can reach 90%.
Embodiment 3
[0050] Preparation of catalyst solvent: put some manganese acetate, cobalt nitrate, cerium acetate, and zinc nitrate in the same beaker, add some deionized water and stir to dissolve until the solution is clear, and then use a graduated cylinder to prepare 250ml of salt solution after cooling to 25°C , the molar ratio of metal elements in the solution is Mn:Co:Ce:Zn=10:0.5:0.3:0.2, ammonium carbonate and an appropriate amount of deionized water are configured into a 300ml ammonium carbonate aqueous solution, and the above two prepared The solution is mixed and stirred to cause a precipitation reaction to occur. Keep stirring at a constant speed of 600rpm and the pH value = 8. The reaction is controlled at 15 minutes. The suspension is aged for 2 hours and then filtered. The filter cake is washed with deionized water several times until the pH reaches 7. Put the filter cake in an oven at 120°C for 12 hours, crush and grind it to a particle size above 100 mesh, put it into a roas...
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