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By-product ceramsite after sludge treatment based on plants and its preparation method and application

A kind of sludge and plant technology, applied in the field of water pollution control, can solve the problems that are rarely reported, and achieve the effects of porous internal structure, wide sources, good ecological environment gain and economic gain

Active Publication Date: 2022-01-14
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 after sludge treatment based on plants and its preparation method and application
  • By-product ceramsite after sludge treatment based on plants and its preparation method and application
  • By-product ceramsite after sludge treatment based on plants and its preparation method and application

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Experimental program
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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 the treated dry sludge (sludge after planting and drying the sage) and the residue of the sage in the underground as raw materials, and crush it to a fineness of 80-100 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 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 high-tempera...

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 the 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 at 15°C / min, and the carbonization temperature at 450°C and The carbonization holding time is 200 minutes, the raw materials are subjected to ...

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Abstract

The invention relates to the technical field of water pollution control, and discloses a by-product ceramsite based on plant treatment sludge and its preparation method and application. The ceramsite includes the following components in mass percentage: fly ash 30~ 50%, biochar 5-10%, bentonite 20-30%, magnesium carbonate 10-30%, sodium silicate 5-10%, silicon dioxide 2-5%. The preparation method comprises the following steps: S101, preparing biochar; S102, preparing green pellets; S103, drying; S104, calcining. The present invention uses the mixture of sludge treated by plants and the residues of the royal bamboo grass as raw materials to prepare biochar, and then mixes materials such as fly ash, bentonite, quicklime, etc., and pyrolyzes them according to a certain mass ratio to prepare pottery. grain. While realizing the maximum resource utilization of the sludge and its by-products after planting plant products are dried, it is also possible to produce ceramsite that can absorb nitrogen and phosphorus in water, and apply it to the eutrophic water 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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Patent Type & Authority Patents(China)
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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