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A novel lightweight high-porosity ceramic filter material and its preparation method

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 effect of overcoming difficult-to-control and easy-running materials, abundant micropores, and overcoming large head loss

Active Publication Date: 2022-03-15
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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  • A novel lightweight high-porosity ceramic filter material and its preparation method
  • A novel lightweight high-porosity ceramic filter material and its preparation method
  • A novel lightweight high-porosity ceramic filter material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Take the above-mentioned raw materials according to the ratio of 30 parts of fly ash floating beads, 20 parts of coal gangue, 15 parts of diatomaceous earth, 20 parts of hydroxymethyl cellulose, 6 parts of dolomite powder, 2 parts of rice bran, and 8 parts of limestone;

[0031] (2) Ball milling is carried out after mixing the raw materials taken in step (1), and passing through a 200-mesh sieve after ball milling;

[0032] (3) the blank mixed in step (2) is used as a binding agent in a mortar to make a certain plasticity mud material, and then prepared into pellets with a particle size of 5-8mm;

[0033] (4) Place the sample formed in step (3) in a drying oven to dry at a constant temperature of 50°C for 1 hour;

[0034] (5) Sinter the dried sample in step (4), decompose 1 at 530°C and sinter at 1170°C for 3h before sintering.

[0035] (6) Attaching a layer of carbon nanofibers to the surface of the sample after the sintering in step (5).

Embodiment 2

[0037] (1) Take the above-mentioned raw materials according to the ratio of 35 parts of fly ash floating beads, 25 parts of coal gangue, 20 parts of diatomaceous earth, 25 parts of hydroxymethyl cellulose, 8 parts of dolomite powder, 3 parts of rice bran, and 9 parts of limestone;

[0038] (2) Ball milling is carried out after mixing the raw materials taken in step (1), and passing through a 200-mesh sieve after ball milling;

[0039] (3) the blank mixed in step (2) is used as a binding agent in a mortar to make a certain plasticity mud material, and then prepared into pellets with a particle size of 5-8mm;

[0040] (4) Place the sample formed in step (3) in a drying oven to dry at a constant temperature of 55°C for 2 hours;

[0041] (5) The sample dried in step (4) was sintered, decomposed at 700° C. for 2 hours, and sintered at 1180° C. for 4 hours before sintering.

[0042] (6) Attaching a layer of carbon nanofibers to the surface of the sample after the sintering in step ...

Embodiment 3

[0044] (1) Take the above raw materials according to the ratio of 40 parts of fly ash floating beads, 30 parts of coal gangue, 25 parts of diatomaceous earth, 30 parts of hydroxymethyl cellulose, 9 parts of dolomite powder, 3 parts of rice bran, and 10 parts of limestone;

[0045] (2) Ball milling is carried out after mixing the raw materials taken in step (1), and passing through a 200-mesh sieve after ball milling;

[0046] (3) the blank mixed in step (2) is used as a binding agent in a mortar to make a certain plasticity mud material, and then prepared into pellets with a particle size of 5-8mm;

[0047] (4) Place the sample formed in step (3) in a drying oven to dry at a constant temperature of 60°C for 2 hours;

[0048] (5) The sample dried in step (4) was sintered, decomposed at 850° C. for 2 hours, and sintered at 1200° C. for 4 hours before sintering.

[0049] (6) Attaching a layer of carbon nanofibers to the surface of the sample after the sintering in step (5).

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Abstract

The invention relates to the technical field of sewage treatment, and discloses a novel light-weight high-porosity ceramic filter material and a preparation method thereof. Use fly ash floating beads, coal gangue, and diatomaceous earth as aggregates, use hydroxymethyl cellulose as a binder, supplemented with dolomite powder, pore-forming agent, and limestone to prepare ceramic filter materials, and adhere to the surface of ceramic filter materials carbon nanofibers. The filter material has strong dirt-holding capacity, high utilization rate of filter material, and slow increase of water head loss. Under the same conditions, the filtration rate can reach 16m / h, the working cycle is more than 24h, and the periodic water production reaches 800‑1000m 3 / m 3 , is 1.5-2 times that of quartz sand filter material.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a novel lightweight high-porosity ceramic filter material and a preparation method thereof. Background technique [0002] Biological aerated filter is a sewage treatment technology that has received widespread attention in recent years. It is a sewage treatment facility that integrates biodegradation and solid-liquid separation. It has the characteristics of small footprint, high treatment efficiency, and convenient operation and management. It mainly relies on The microorganisms fixed and grown on the filter material decompose organic matter and nitrify ammonia nitrogen. Therefore, all factors that affect the growth and metabolic activity of microorganisms will affect the purification effect of biological treatment, such as influent water quality, water temperature, pH, filter material type, structural characteristics and filter material specific surface area, etc. [...

Claims

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Application Information

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Patent Type & Authority Patents(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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