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By-product ceramsite based on sludge treatment by plants as well as preparation method and application of by-product ceramsite

A ceramsite and sludge technology, applied in the field of water pollution control, can solve problems such as few reports, and achieve the effects of porous internal structure, good ventilation effect and simple preparation process

Active Publication Date: 2021-04-09
PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent CN110467429 A discloses a method of using biochar to prepare highly adsorbable ceramsite. In the example, it is only applied to the adsorption of polluted gases, but there are few reports on water treatment and purification systems.

Method used

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  • By-product ceramsite based on sludge treatment by plants as well as preparation method and application of by-product ceramsite
  • By-product ceramsite based on sludge treatment by plants as well as preparation method and application of by-product ceramsite
  • By-product ceramsite based on sludge treatment by plants as well as preparation method and application of by-product ceramsite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A by-product ceramsite based on plant-treated sludge, the ceramsite includes the following components by mass percentage: 30-50% of fly ash, 5-10% of biochar, 20-30% of bentonite, Magnesium carbonate 10-30%, sodium silicate 5-10%, silicon dioxide 2-5%.

[0031] The above-mentioned preparation method based on the by-product ceramsite after plant treatment sludge comprises the following steps:

[0032] S101. Preparation of biochar: use treated dry sludge (sludge that has been planted and dried) and the residual body of royal bamboo grass in the underground as raw materials, and pulverize it to a fineness of 80-100 Put it into a porcelain crucible, fill it up and compact it, cover it and put it in a box-type resistance muffle furnace, feed inert gas to drive away the air in the furnace, set the heating rate of the muffle furnace at 5-20°C / min, and carbonize The temperature is 300-600°C and the carbonization holding time is 0.5-4 hours. The raw materials are subjected to h...

Embodiment 2

[0071] The present embodiment is with embodiment 1 except following proportioning:

[0072] The composition of the ceramsite in terms of mass percentage: 7% of biochar, 40% of fly ash, 15% of bentonite, 25% of magnesium carbonate, 9% of sodium silicate, and 4% of silicon dioxide.

[0073] The above-mentioned preparation method based on the by-product ceramsite after plant treatment sludge comprises the following steps:

[0074] S101, preparation of biochar: using the treated dry sludge (planted and dried sludge) and the residual body of the royal bamboo grass in the underground as raw materials, pulverizing it to a fineness of 100 mesh, Put it into a porcelain crucible, fill it up and compact it, cover it and place it in a box-type resistance muffle furnace, feed inert gas to drive away the air in the furnace, set the heating rate of the muffle furnace to 10°C / min, and the carbonization temperature to 500°C and The carbonization holding time is 150 minutes, the raw materials ...

Embodiment 3

[0079] The present embodiment is with embodiment 1 except following proportioning:

[0080] The composition of ceramsite in terms of mass percentage: 6% of biochar, 35% of fly ash, 28% of bentonite, 20% of magnesium carbonate, 8% of sodium silicate, and 3% of silicon dioxide.

[0081] The above-mentioned by-product ceramsite preparation method based on plant treatment sludge comprises the following steps:

[0082] S101, preparation of biochar: using the treated dry sludge (planted and dried sludge) and the residue of the royal bamboo grass in the underground as raw materials, pulverizing it to a fineness of 90 mesh, Put it into a porcelain crucible, fill it up and compact it, cover it and place it in a box-type resistance muffle furnace, feed inert gas to drive away the air in the furnace, set the heating rate of the muffle furnace to 15°C / min, and the carbonization temperature to 450°C and The carbonization holding time is 200 minutes, the raw materials are subjected to high...

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Abstract

The invention relates to the technical field of water pollution treatment, and discloses by-product ceramsite based on sludge treatment by plants as well as a preparation method and application of the by-product ceramsite, and the ceramsite comprises the following components in percentage by mass: 30-50% of fly ash, 5-10% of biochar, 20-30% of bentonite, 10-30% of magnesium carbonate, 5-10% of sodium silicate and 2-5% of silicon dioxide. The preparation method comprises the following steps: S101, preparing biochar; S102, preparing a green ball material; S103, conducting drying; and S104, conducting calcining. A mixture of sludge after plant treatment and pennisetum hydridum residues is used as a raw material to prepare biochar, fly ash, bentonite, quick lime and other materials are mixed into the biochar, and the formed mixture is subjected to high-temperature pyrolysis according to a certain mass ratio to prepare the ceramsite. The ceramsite capable of adsorbing nitrogen and phosphorus in water can be produced while maximum resource utilization of dried sludge and by-products of planted plant products is achieved, and the ceramsite can be applied to a eutrophic water body purification treatment system.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to ceramsite, a by-product of plant-based sludge treatment, and a preparation method and application thereof. Background technique [0002] Sludge treatment is an important part of water pollution control and water environment protection. If sludge is not properly disposed of, it will not only have a negative impact on the ecological environment, but also endanger people's health. The main disposal methods of sludge at home and abroad are agricultural and forestry utilization. , sanitary landfill, incineration, etc. Sludge is directly incinerated. Due to the high moisture content of fresh sludge, additional fuel is required and the cost is high. The sanitary landfill of sludge occupies a huge area and is currently banned in many places. In the long run, the agricultural and forestry resource utilization of sludge is a promising and popular treatment method. [0003...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B33/13C04B33/135C04B33/30C04B33/32B01J20/20C02F1/28C02F3/00C02F3/32
CPCC04B38/009C04B33/13C04B33/1352C04B33/30C04B33/32B01J20/20B01J20/103B01J20/12B01J20/043B01J20/10C02F1/281C02F1/283C02F3/00C02F3/325C02F2003/003C04B2235/3206C04B2235/3427C04B2235/3201C04B2235/3418C04B2235/656C04B2235/6567C04B38/02Y02P40/60
Inventor 黑亮陈文龙蔡名旋范群芳余顺超黄徐
Owner PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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