Novel lightweight high-porosity ceramic filter material and preparation method thereof

A high-porosity, ceramic filter material technology, applied in ceramic products, ceramic material production, chemical instruments and methods, etc., can solve the problems affecting the filtration cycle and effluent quality, the lack of roughness of the surface structure, affecting the hydraulic retention time, etc. Achieve the effects of overcoming difficult-to-control and easy-running materials, abundant micropores, and overcoming large head loss

Active Publication Date: 2021-04-06
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as far as the current use of ceramic filter materials in my country is concerned, there are the following problems: ceramsite has a high wear and tear rate, is easy to drop foam, clogs the filter tank, affects the filtration cycle and the quality of the effluent water; the particles are irregular, the water flow resistance is large, and the water power is affected. Residence time; most of the existing ceramsite is clay and shale, etc., and its performance is unstable; the surface structure lacks reasonable roughness, and the surface of ceramsite is easy to be glazed, which is not conducive to increasing the specific surface area

Method used

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  • Novel lightweight high-porosity ceramic filter material and preparation method thereof
  • Novel lightweight high-porosity ceramic filter material and preparation method thereof
  • Novel lightweight high-porosity ceramic filter material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030](1) 30 copies of powder coal beads, 20 coal gangue, 15 pieces of diatomaceous earth, 6 copies of 2 parts of hydroxymethylcellulose, 2 rice bran, and 8 pieces of limestone.

[0031](2) After mixing the raw material weighing step (1), the ball mill is performed, and the ball is over 200 mesh sieve;

[0032](3) Mix the billet mixed with step (2) to make a plasticity with water in a mortar, and then prepute a small ball having a particle size of 5-8 mm;

[0033](4) Place the sample formed by step (3) in the drying tank at 50 ° C constant temperature drying 1H;

[0034](5) The sample after drying step (4) was sintered, and then decomposed at 530 ° C before sintering, sintered at 1170 ° C for 3 h.

[0035](6) A layer of carbon nanofibers are attached to the surface of the sample after the sintering of step (5).

Embodiment 2

[0037](1) 35 pieces of powder coal ash, 25 coal gangue, 20 pieces of diatomaceous earth, 25 copies of dolomite powder, 3 rice bran, and 9 石 石 石;;

[0038](2) After mixing the raw material weighing step (1), the ball mill is performed, and the ball is over 200 mesh sieve;

[0039](3) Mix the billet mixed with step (2) to make a plasticity with water in a mortar, and then prepute a small ball having a particle size of 5-8 mm;

[0040](4) Place the sample formed by step (3) in the drying tank at a constant temperature of 55 ° C for 2 h;

[0041](5) The sample after drying after (4) was sintered, and then decomposed at 700 ° C for 2 h before sintering, and 4 h was sintered at 1180 ° C.

[0042](6) A layer of carbon nanofibers are attached to the surface of the sample after the sintering of step (5).

Embodiment 3

[0044](1) 40 copies of powder coal ash, 30 coal gangue, 25 diatomaceous earth, 9 pieces of hydroxymethylcellulose, 9 parts of Dolomite powder, 3 rice bran, and 10 grade stone;

[0045](2) After mixing the raw material weighing step (1), the ball mill is performed, and the ball is over 200 mesh sieve;

[0046](3) Mix the billet mixed with step (2) to make a plasticity with water in a mortar, and then prepute a small ball having a particle size of 5-8 mm;

[0047](4) Place the sample formed by step (3) in the drying tank at 60 ° C constant temperature drying 2h;

[0048](5) The sample after drying step (4) was sintered, and the first was decomposed at 850 ° C for 2 h before sintering, and 4 h was sintered at 1200 ° C.

[0049](6) A layer of carbon nanofibers are attached to the surface of the sample after the sintering of step (5).

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Abstract

The invention relates to the technical field of sewage treatment, and discloses a novel lightweight high-porosity ceramic filter material and a preparation method thereof. Fly ash floating beads, coal gangue and diatomite are used as aggregates, hydroxymethyl cellulose is used as a binder, dolomite powder, a pore-forming agent and limestone are used as auxiliary materials to prepare the ceramic filter material, and carbon nanofibers are attached to the surface of the ceramic filter material. The filter material is strong in pollutant holding capacity, high in filter material utilization rate and slow in water head loss increase, the filter speed can reach 16m/h, the working period is more than 24h, and the periodic water yield reaches 800-1000m < 3 >/m3 and is 1.5-2 times of that of a quartz sand filter material under the same condition.

Description

Technical field[0001]The present invention relates to the field of sewage treatment, and more particularly to a new type of light high porosity ceramic filter material and a preparation method thereof.Background technique[0002]The aeration biofilter is a wastewater treatment technology that has been widely concerned in recent years. It is the sewage treatment facility that is integrated in groups and solid-liquid separation. It has the characteristics of small area, high processing efficiency, convenient operation management, mainly A fixed microorganism is fixed on the filter material to decompose organics and nitrate ammonia nitrogen. Therefore, all factors affecting the growth metabolic activity of microbial growth affect the purification effect of biological treatment, such as water quality, water temperature, pH, filter material type, structural characteristics, and filter specific surface area.[0003]However, in many influencing factors, their core is filter material performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/135C04B33/13C04B33/32C04B41/85C04B38/06C04B38/02C04B38/08C02F3/02C02F101/16
CPCC04B33/1324C04B33/1328C04B33/1352C04B33/13C04B33/32C04B41/85C04B41/5001C04B38/009C02F3/02C02F2003/001C02F2101/16C04B2235/3418C04B2235/321C04B2235/3208C04B2235/656C04B2235/6567C04B38/0675C04B38/02C04B38/08C04B41/4596C04B41/4568Y02W10/10Y02P40/60
Inventor 周科
Owner TIANJIN UNIV
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