Preparation method of non-sintered ceramsite with ammonia nitrogen adsorption function

A technology of ammonia nitrogen and ceramsite, which is applied in the field of preparation of unfired ceramsite, can solve problems such as secondary pollution, and achieve the effects of increasing strength, increasing activity, and low cost

Inactive Publication Date: 2016-08-03
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is not handled properly, it will be placed randomly, which will cause secondary pollution

Method used

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  • Preparation method of non-sintered ceramsite with ammonia nitrogen adsorption function
  • Preparation method of non-sintered ceramsite with ammonia nitrogen adsorption function
  • Preparation method of non-sintered ceramsite with ammonia nitrogen adsorption function

Examples

Experimental program
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Effect test

Embodiment 1

[0058] 1) Pretreatment of raw materials: Soak fly ash at 25°C for 3 days with 5% NaOH solution by mass percentage, wash it with deionized water, and dry it in an electric constant temperature drying oven at 105°C. The surface of the coal ash is modified to enhance its adsorption capacity for ammonia nitrogen; the remaining sludge, calcium oxide, sodium bicarbonate, and Portland cement taken from the dehydration workshop of the urban sewage plant are dried at 105°C; all the above raw materials After drying, pulverize through a pulverizer and pass through a 100-mesh sieve for subsequent use;

[0059] 2) Mixing of raw materials: fully mix the above pretreated raw materials according to the following mass ratio: 70.9% of fly ash, 7.1% of calcium oxide, 7% of residual sludge, 1% of sodium bicarbonate, and 9% of Portland cement;

[0060] 3) Granulation: dissolving water glass with a mass percentage of 5% in 34g / (100g dry weight) water, then pouring into the mixed raw materials and s...

Embodiment 2

[0071] 1) Pretreatment of raw materials: Soak fly ash at 25°C for 3 days with 5% NaOH solution by mass percentage, wash it with deionized water, and dry it in an electric constant temperature drying oven at 105°C. The surface of the coal ash is modified to enhance its adsorption capacity for ammonia nitrogen; the remaining sludge, calcium oxide, sodium bicarbonate, and Portland cement taken from the dehydration workshop of the urban sewage plant are dried at 105°C; all the above raw materials After drying, pulverize through a pulverizer and pass through a 100-mesh sieve for subsequent use;

[0072]2) Mixing of raw materials: fully mix the above pretreated raw materials according to the following mass ratio: fly ash 68%, calcium oxide 7%, excess sludge 10%, sodium bicarbonate 1%, Portland cement 9%;

[0073] 3) Granulation: dissolving water glass with a mass percentage of 5% in 34g / (100g dry weight) water, then pouring into the mixed raw materials and stirring evenly to make a ...

Embodiment 3

[0078] 1) Pretreatment of raw materials: Soak fly ash at 25°C for 3 days with 5% NaOH solution by mass percentage, wash it with deionized water, and dry it in an electric constant temperature drying oven at 105°C. The surface of the coal ash is modified to enhance its adsorption capacity for ammonia nitrogen; the remaining sludge, calcium oxide, sodium bicarbonate, and Portland cement taken from the dehydration workshop of the urban sewage plant are dried at 105°C; all the above raw materials After drying, pulverize through a pulverizer and pass through a 100-mesh sieve for subsequent use;

[0079] 2) Mixing of raw materials: The above pretreated raw materials are fully mixed according to the following mass ratio: 72% of fly ash, 4% of calcium oxide, 10% of excess sludge, 3% of sodium bicarbonate, and 6% of Portland cement;

[0080] 3) Granulation: dissolving water glass with a mass percentage of 5% in 34g / (100g dry weight) water, then pouring into the mixed raw materials and ...

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Abstract

The invention provides a preparation method of non-sintered ceramsite with an ammonia nitrogen adsorption function. The method comprises the following steps: 1) preprocessing raw materials: immersing fly ash in a NaOH solution, washing the immersed fly ash with water, and drying the washed fly ash; drying excess sludge, calcium oxide, sodium bicarbonate and portland cement; and drying all above raw materials, crushing the dried raw materials, and sieving the crushed raw materials; 2) mixing the raw materials: mixing the above preprocessed raw materials, by mass, 66-85% of fly ash, 3-8% of calcium oxide, 7-13% of excess sludge, 1-5% of sodium bicarbonate and 3-9% of portland cement; 3) granulating: dissolving water glass in water, pouring the obtained water glass solution to the mixed raw materials, and uniformly stirring to make a blank; 4) curing: covering the blank with a wet gauze, regularly watering the blank, putting the blank in a sterilization pot, and carrying out steam curing; and 5) ageing: putting the cured blank in dry environment to prepare the non-sintered ceramsite with an ammonia nitrogen adsorption function. The non-sintered ceramsite prepared in the invention has the advantages of low price, high economical efficiency, environmental protection, and suitableness for treatment of medium and low concentrations of ammonia nitrogen wastewater.

Description

technical field [0001] The invention provides a method for preparing unfired ceramsite with ammonia nitrogen adsorption function, and relates to the field of sewage treatment. Background technique [0002] Ammonia nitrogen, refers to the free ammonia (or non-ionic ammonia NH 3 ,) or ionic ammonia (NH 4 + ) form of nitrogen. Ammonia nitrogen mainly comes from human and animal excrement, rainwater runoff, loss of agricultural fertilizers, and industrial wastewater such as petrochemical, metallurgy, gas, and coking. [1] . The harm caused by the massive discharge of ammonia nitrogen wastewater is firstly the excessive consumption of dissolved oxygen in water, which leads to the death of fish and other aquatic organisms due to hypoxia, and at the same time causes the phenomenon of eutrophication in water bodies; secondly, the ammonia nitrogen oxidation product nitrite nitrogen is toxic and easily causes The function of the liver, spleen and kidneys is incomplete, the oxygen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/04C04B18/04C04B18/08C04B22/06C04B22/08C04B22/10
CPCC04B18/0418C04B18/08C04B22/064C04B22/08C04B22/10C04B28/04C04B38/02C04B2201/20C04B38/0074Y02W30/91
Inventor 邵青周靖淳朱祖福宋银强牛沛
Owner WUHAN UNIV
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