Filter medium and preparation method thereof

A filtering medium and filtering precision technology, applied in the field of filtering medium and its preparation, achieves the effects of low production cost, safe production process and controllable filtering precision

Inactive Publication Date: 2010-09-22
张顺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of filter medium not only has compact and uniform pore size formed on the surface, and the filtration precision can be adjusted according to the amount of pore-forming agent added, it effectively overcomes the problems of precipitation of the filter medium, desorption of impurities and gap filtration during the filtration process, and the water The base adhesive forms a large amount of gas during the evaporation and drying process of water, and dredges the clogged micropore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Activated carbon powder (60-325 mesh) 40 polyvinyl alcohol 7 water 53

[0028] Its preparation method is as follows:

[0029] Weigh each raw material according to the percentage of formula quantity, and the operation steps are as follows:

[0030] ① Weigh each raw material according to the percentage of formula quantity.

[0031] ②Heat water and water-based binder polyvinyl alcohol to above 90 degrees, mix and stir to make glue.

[0032] ③Mix the glue and activated carbon powder and stir evenly.

[0033] ④Put the raw materials mixed in step ③ into the pre-prepared mold for stamping or extrusion molding, and then slowly heat to 155-165 degrees to dry the moisture in the mold to shape it, that is, it becomes porous Filter media of specified shape.

Embodiment 2

[0035] Activated carbon powder (80-325 mesh) 25 zeolite powder (100-325 mesh) 12 polyvinyl alcohol 7 ammonium bicarbonate 3 water 53

[0036] Its preparation method is as follows:

[0037] Weigh each raw material according to the percentage of formula quantity, and the operation steps are as follows:

[0038] ① Weigh each raw material according to the percentage of formula quantity.

[0039] ②Heat water and water-based binder polyvinyl alcohol to above 90 degrees, mix and stir to make glue.

[0040] ③Mix the glue with activated carbon powder, zeolite powder and ammonium bicarbonate and stir evenly.

[0041] ④Put the raw materials mixed in step ③ into an extruder to extrude into a tubular shape, and then slowly heat to 160-170 degrees to dry the moisture in the shape to shape, that is, to become a porous tubular filter medium .

Embodiment 3

[0043] Activated carbon powder (200-325 mesh) 30 diatomite (40-325 mesh) 5 polyvinyl alcohol 5 water 60 Its preparation method is as follows:

[0044] Weigh each raw material according to the percentage of formula quantity, and the operation steps are as follows:

[0045] ① Weigh each raw material according to the percentage of formula quantity.

[0046] ②Heat water and water-based binder polyvinyl alcohol to above 90 degrees, mix and stir to make glue.

[0047] ③Mix the glue solution with activated carbon powder and diatomaceous earth and stir evenly.

[0048] ④Put the raw materials mixed in step ③ into a punching machine and punch them into blocks, and then slowly heat to 160-170 degrees to dry the moisture in the molded body to shape, that is, to become a porous block filter medium.

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Abstract

The invention relates to a filter medium, in particular to a filter medium and a preparation method thereof. The preparation method is as follows: raw materials are taken according to the weight percent of a formula, are added with materials to be mixed and stirred evenly according to the prescribed steps, and then are formed by extrusion and punch in a prefabricated mold, and the forming body is dried and cured at certain temperature to form the filter medium. Absorbing raw materials such as activated carbon, kaolin, diatomaceous earth and the like, and a water based binder such as polyvinyl alcohol, sodium carboxymethyl cellulose, modified starch and the like adopted by the invention are of nontoxic and non-harmful raw materials, and are formed by extrusion and punch under the condition of normal temperature, and in the process of high-temperature curing, water can remove the blockage of the binder for micropores of the absorbing raw materials in the process of extrusion or punch when evaporating, so that the finished product keeps the original absorption characteristics of the absorbing raw materials and simultaneously overcomes the defects that medium raw materials are precipitated when the filter medium is used for filtering.

Description

technical field [0001] The invention relates to a filter medium, in particular to a filter medium and a preparation method thereof. Background technique [0002] At present, with the increasing environmental pollution, the pollution of air and water seriously threatens human life. Purifying air, purifying domestic water and industrial water has become a problem that people generally pay attention to. Air purifiers, water purifiers, etc. are flourishing under such circumstances. [0003] At this stage, the core component filter media used in air purifiers and water purifiers (that is, what people usually call filter elements) are mainly divided into three categories: the first category is a single interception medium, such as PP cotton, ultrafiltration membrane, reverse osmosis membrane, etc.; the second type is a single adsorption medium, such as granular loose carbon, ceramsite, granular molecular sieve, etc. The third category is a filter medium that integrates adsorptio...

Claims

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Application Information

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IPC IPC(8): B01D39/20B01J20/12B01J20/18B01J20/20B01J20/30
Inventor 不公告发明人
Owner 张顺
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