Baking-free type porous composite zeolite filter material and preparation method thereof
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A technology of composite zeolite and filter material, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of poor channel connectivity and small pores of natural zeolite, and achieve the effect of many pores, large pores and stable chemical properties.
Inactive Publication Date: 2009-08-05
UNIV OF JINAN
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Problems solved by technology
However, due to the small internal pores and poor channel connectivity of natural zeolite, its application in the water treatment industry has certain limitations.
Method used
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Embodiment 1
[0018] Take 85% natural zeolite and activate it at 250°C, cool it, ball mill it, take it out, mix it with 10% gypsum, then add 5% soluble starch, stir evenly, sprinkle water into shape, put it in the curing box, and keep the temperature at 18°C , with a humidity of 90%, took it out after 3 days of curing, washed it with deionized water until no residue fell off, and dried it at 90°C to obtain a burn-free porous composite zeolite filter material.
Embodiment 2
[0020] Take 75% natural zeolite and activate it at a high temperature of 450°C, cool it, ball mill it, take it out, mix it with 10% gypsum, and then add 15% Na 2 SO 4 , stir evenly, spray water to form, put it into the curing box, keep the temperature at 20°C, and the humidity at 95%, take it out after curing for 5 days, wash it with deionized water until no residue falls off, and dry it at 95°C to obtain a burn-free porous composite Zeolite filter media.
Embodiment 3
[0022] Take 60% of natural zeolite and activate it at a high temperature of 550°C, cool it, ball mill it, take it out, mix it with 22% bentonite, and then add 18% CaCl 2 , Stir evenly, spray water into shape, put it into the curing box, keep the temperature at 22°C, and the humidity at 97%, take it out after curing for 8 days, wash it with deionized water until no residue falls off, and dry it at 100°C to obtain a burn-free porous composite Zeolite filter media.
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Abstract
The invention provides a burning free type porous compound zeolite filter material. Natural zeolite activated at a high temperature, a bonding agent and a pore forming agent are used as raw materials, and evenly mixed according to a certain ratio, and sprayed with water to form a sphere, during curing, proper temperature, humidity and curing time are kept, and then the burning free type porous compound zeolite filter material is obtained. The surface of the burning free type porous compound zeolite filter material is rough and porous, thereby facilitating the attached growth of microbes in a biological filter, and the filter material has excellent adsorptivity and regenerability, and when being used as a filling material in an aeration biological filter to treat sewage, the filter material can achieve extremely good treating effect. The burning free type porous compound zeolite filter material and the method for preparing the same provided by the invention have the advantages of unnecessary sintering process and no consumption of energy such as coal, electricity and the like, and meet the present national policy on environmental protection of saving energy and reducing emission.
Description
technical field [0001] The invention relates to a filter material for a biological filter, in particular to a non-burning type porous composite zeolite filter material and a preparation method thereof. Background technique [0002] At present, natural zeolite has been widely used in the water treatment industry as the filter material of the biological aerated filter. However, due to the small internal pores and poor channel connectivity of natural zeolite, its application in the water treatment industry has certain limitations. Contents of the invention [0003] In order to overcome the shortcomings of the natural zeolite filter material itself, the invention provides a non-burning type porous composite zeolite filter material with natural zeolite powder as the main raw material and a preparation method thereof. [0004] A burning-free porous composite zeolite filter material comprises 50-85% of natural zeolite, 10-30% of binder and 5-20% of pore-forming agent according t...
Claims
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Application Information
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