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Composite fly ash filling and application thereof

A technology of fly ash and filler, applied in the direction of sustainable biological treatment, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problems of inadequate management of ash discharge facilities, environmental pollution sources, etc., and achieve biological Good film-hanging effect, strong adsorption, and enhanced adsorption performance

Inactive Publication Date: 2007-03-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The policy stipulates that the discharge of fly ash to rivers, lakes and seas is not allowed. However, due to inadequate ash discharge facilities and management problems, a small amount of fly ash and gray water still flow into water bodies, which constitute a source of pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In terms of weight percentage, take 28% of coarse fly ash, 20% of fine fly ash, 8% of sodium silicate, 4% of Guanyin soil, and 13% of white cement. After mixing the above powders, add 27% of water and stir to make Form small balls with a particle size of about 1 cm; heat at 160°C for 3 hours, keep warm for 1 hour, cool to room temperature naturally, water and maintain for 4 hours, and dry naturally to obtain fly ash pellets.

[0034] The adsorption force of the ball was measured, and the adsorption rate of ammonia nitrogen per unit mass of the filler was 12.02%; the compressive strength was measured to be 312.0N by using an electric flexural testing machine.

Embodiment 2

[0036] In terms of weight percentage, take 20% of coarse fly ash, 25% of fine fly ash, 10% of sodium silicate, 2% of Guanyin clay, and 15% of white cement. After mixing the above powders, add 28% of water and stir to make Form small balls with a particle size of about 1 cm; heat at 100°C for 4 hours, keep warm for 1 hour, cool to room temperature naturally, water and maintain for 6 hours, and dry naturally to obtain fly ash pellets.

[0037] The adsorption force of the ball was measured, and the adsorption rate of ammonia nitrogen per unit mass of the filler was 10.78%; the compressive strength was measured to be 445.3N by using an electric flexural testing machine.

Embodiment 3

[0039] In terms of weight percentage, take 40% of coarse fly ash, 15% of fine fly ash, 5% of sodium silicate, 6% of Guanyin soil, and 10% of white cement. After mixing the above powders, add 24% of water and stir to make Form small balls with a particle size of about 1 cm; heat at 200°C for 5 hours, keep warm for 1 hour, cool to room temperature naturally, water and cure for 10 hours, and dry naturally to obtain fly ash pellets.

[0040] The adsorption force of the ball was measured, and the adsorption rate of ammonia nitrogen per unit mass of the filler was 14.26%; the compressive strength was measured to be 283.6N by using an electric flexural testing machine.

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Abstract

The invention discloses composite fly ash filler in the effluent disposal technological domain, which comprises the following steps: rough fly coal, fine fly ash, sodium silicate, kwan-yin soil, white cement and water. The preparing method comprises the following steps: blending each material according to proportion; adding water to stir; forming mini-ball grain size at 5-20 mm; heating; insulating; cooling naturally; watering; drying to obtain the product; fitting for artificial marshland to dispose effluent.

Description

Technical field: [0001] The invention relates to a composite fly ash filler and its application. The artificial wetland using the filler can treat reclaimed water, polluted landscape water, domestic sewage, etc., and belongs to the technical field of sewage treatment. Background technique [0002] Fly ash is a kind of volcanic ash-like mixed material formed after coal powder is burned at high temperature. It is mainly solid waste discharged from coal-fired power plants, smelting, chemical and other industries. Due to various reasons, the utilization rate of fly ash in my country is still relatively low, most of which are still stored in ash yards, and a small amount of fly ash still floats into the atmosphere. The policy stipulates that the discharge of fly ash to rivers, lakes and seas is not allowed. However, due to inadequate ash discharge facilities and management problems, a small amount of fly ash and gray water still flow into water bodies, which constitute a source o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/10
CPCY02W10/10
Inventor 张鸿涛张秋贞廖志民吴吉军万爱国
Owner TSINGHUA UNIV
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