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Granular activated carbon filler for paper mill sludge and preparation method thereof

A granular activated carbon and papermaking sludge technology, applied in the field of environmental science, can solve problems such as waste of land resources, high production costs, and application restrictions, and achieve the effects of developed pore structure, easy availability of raw materials, and wide application range

Inactive Publication Date: 2011-10-05
SHANDONG UNIV
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Problems solved by technology

[0002] With the development of the paper industry, the output of paper sludge has also increased rapidly. Due to financial and technical reasons, the current treatment of paper sludge is still dominated by landfill, stacking and incineration. Traditional treatment methods waste a lot of waste. land resources, and will cause secondary pollution, how to properly dispose and utilize these sludges has become one of the hotspots of environmental protection that all countries in the world have paid attention to and paid close attention to.
[0003] At present, the raw materials for the production of activated carbon are mainly wood, coconut shell and coal, etc., and its production cost is relatively high, which limits its application in the field of wastewater treatment.

Method used

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  • Granular activated carbon filler for paper mill sludge and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Separately crush the dried papermaking sludge and bentonite, and pass through a 100-mesh sieve, with a particle diameter of ≤0.15mm;

[0029] (2) Mix the sieved dried papermaking sludge and bentonite evenly in a weight ratio of 90; 10, and use a composite binder to make raw meal balls in a granulator;

[0030] (3) Dry the raw meal balls at room temperature, and then carbonize at 400-500°C for 30-40 minutes without air;

[0031] (4) The carbonized raw meal balls are put into an activation furnace for activation treatment, and the activation temperature is 850-900°C.

[0032] The particle density of the prepared sludge granular activated carbon filler is 1200-1300Kg / m 3 , the specific surface area is 120-150m 2 / g, its macrovoid, mesopore and microporous structure are developed, such as figure 1 As shown in the scanning electron microscope photos, and the production cost is far lower than commercial granular activated carbon, it can be used as a substitute in the a...

Embodiment 2

[0034] (1) Separately crush the dried papermaking sludge and bentonite, and pass through a 100-mesh sieve, with a particle diameter of ≤0.15mm;

[0035] (2) Mix the sieved dried papermaking sludge and bentonite evenly in a weight ratio of 80:20, and use a composite binder to make raw meal balls in a granulator;

[0036] (3) Dry the raw meal balls at room temperature, and then carbonize at 400-500°C for 30-40 minutes without air;

[0037] (4) putting the carbonized product into hydrochloric acid or 20% sulfuric acid with a mass fraction of 10% and soaking it for 6-9h to carry out modification treatment;

[0038] (5) Put the acid-soaked sphere into an activation furnace for activation treatment, and the activation temperature is 800-900°C.

[0039] The prepared sludge granular activated carbon filler particle density is 1050-1100Kg / m 3 , the specific surface area is 180-200m 2 / g, density close to water, easy to fluidize, well-developed pore structure, good for film formation...

Embodiment 3

[0041] (1) Separately crush the dried papermaking sludge and bentonite, and pass through a 100-mesh sieve, with a particle diameter of ≤0.15mm;

[0042] (2) Mix the sieved dry papermaking sludge and bentonite evenly in a weight ratio of 70:30, and use a composite binder to make raw meal balls in the granulator;

[0043] (3) Dry the raw meal balls at room temperature, and then carbonize at 400-500°C for 30-40 minutes without air;

[0044] (4) Put the carbonized raw meal balls into an activation furnace for activation treatment, and the activation temperature is 800-850°C.

[0045] The prepared sludge granular activated carbon filler particle density is 1250-1300Kg / m 3 , the specific surface area is 80-100m 2 / g, the pore structure is developed, which is conducive to film formation, and is suitable as a filler for biological aerated filters.

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Abstract

The invention relates to a granular activated carbon filler for paper mill sludge and a preparation method thereof. The preparation method comprises the following steps: mixing 70-90 parts by weight of anhydrated paper mill sludge and 10-30 parts by weight of bentonite, performing granulation in a granulator, drying at room temperature, performing carbonization of the raw balls at a low temperature, modifying the carbonized material balls with hydrochloric acid, and activating the balls in an activation furnace. The sludge granular activated carbon filler prepared by the invention has the characteristics of large specific surface area, developed pores, high intensity, and the like. Fillers sintered at different process conditions can be respectively used as reactor fillers for sewage treatment, biological aerated filters, fluidized beds, and the like, have wide application range and low cost.

Description

technical field [0001] The invention relates to a paper-making sludge granular activated carbon filler and a preparation method thereof, belonging to the field of environmental science and technology. Background technique [0002] With the development of the paper industry, the output of paper sludge has also increased rapidly. Due to financial and technical reasons, the current treatment of paper sludge is still dominated by landfill, stacking and incineration. Traditional treatment methods waste a lot of waste. land resources, and will cause secondary pollution, how to properly dispose and utilize these sludges has become one of the hotspots of environmental protection issues that all countries in the world pay attention to and pay attention to. [0003] At present, the raw materials for the production of activated carbon are mainly wood, coconut shell and coal, etc., and its production cost is relatively high, which limits its application in the field of wastewater treatm...

Claims

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Application Information

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IPC IPC(8): C01B31/12B01J20/20B01J20/30C02F3/10C02F1/28B09B3/00
CPCY02W10/10
Inventor 岳钦艳李雁杰高悦于欢高宝玉赵海霞于慧
Owner SHANDONG UNIV
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