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Method for rapidly preparing porous magnetic active coke based on dewatered sludge

A dewatered sludge and activated coke technology, applied in the field of waste recycling, can solve the problems of small specific surface area, limited range of resource utilization, difficult adsorbents, etc., achieve good safety, expand the field of sludge resource utilization, The effect of shortening the reaction time

Active Publication Date: 2018-08-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its small specific surface area, it is difficult to be used as an adsorbent in the treatment of heavy metal and organic polluted wastewater, thus limiting its resource utilization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Air-dry the dewatered sludge with a moisture content of 80%, crush it into particles with a diameter of about 1mm, take 5g and put it into a stainless steel reaction kettle with a volume of 100mL, add 5mL of distilled water, seal it, and control the magnetic stirring speed to 500r / min , heated to 160°C and reacted for 0.5h. After the reaction, the reaction kettle was naturally cooled to room temperature, and the solid-liquid mixture obtained from the reaction was poured out into a beaker, washed with 10mL hydrochloric acid with a concentration of 0.1mol / L, and then washed with 10mL volume fraction of Soak in 85% ethanol, rinse with 50 mL of distilled water, vacuum filter, and finally weigh to obtain 2.9 g of precursor product.

[0025] Weigh 2.5g of the precursor product obtained above into a conical flask equipped with 50mL of distilled water, then add 0.5g of new ecological ferric hydroxide and 0.25g of zinc chloride, seal, soak and shake at a rate of 100r / min for 2h, ...

Embodiment 2

[0027] Air-dry the dewatered sludge with a moisture content of 60%, crush it into particles with a diameter of about 3mm, take 10g and put it into a stainless steel reaction kettle with a volume of 100mL, add 20mL of distilled water, seal it, and control the magnetic stirring speed to 800r / min , heated to 260°C to react for 2 hours. After the reaction, cool the reaction vessel to room temperature naturally, pour out the solid-liquid mixture obtained from the reaction into a beaker, rinse with 20mL hydrochloric acid with a concentration of 0.1mol / L, and then use 20mL with a volume fraction of 50 % acetone soaked, then rinsed with 40mL distilled water, vacuum filtered, and finally weighed to obtain 4.5g precursor product.

[0028] Weigh 2.5g of the precursor product obtained above into a conical flask filled with 50mL of distilled water, then add 0.25g of new ecological ferrous hydroxide and 0.75g of potassium hydroxide respectively, seal it, soak and shake at a speed of 300r / min...

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Abstract

The invention provides a method for rapidly preparing porous magnetic active coke based on dewatered sludge. The method includes the steps: drying the dewatered sludge by air and crushing the dewatered sludge into sludge particles; placing the dried sludge particles into a stainless steel reactor, adding distilled water, sealing the stainless steel reactor, performing magnetic stirring and performing reaction after heating; performing cooling, cleaning and vacuum filtering after reaction to obtain a precursor product; immersing the precursor product into activating agent and catalyst solution,performing sealing and vibrating after immersion, performing vacuum filtering, and performing heating and reaction after air drying; cooling, cleaning and drying the solution to obtain the porous magnetic active coke. The method is simple and rapid in technological process, good in safety, mild in reaction and low in energy consumption, the prepared active coke is developed in porous structure, has good magnetism, is easily recovered and recycled, can be widely applied to waste water and waste gas treatment and has remarkable economic and environmental benefits, and the field of sludge recycling is greatly widened.

Description

technical field [0001] The invention belongs to the technical field of waste recycling, in particular to a method for rapidly preparing porous magnetic active coke based on dewatered sludge. Background technique [0002] According to statistics, the output of surplus sludge from urban sewage treatment in my country in 2016 was as high as 43 million tons (water content 80%). At present, the main treatment methods include aerobic / anaerobic digestion, dehydration, drying and incineration, and sanitary landfill. However, the amount of sludge generated in our country is huge, and the treatment capacity at this stage is seriously insufficient. Therefore, the safe treatment and disposal of sludge has become one of the environmental problems that need to be solved urgently in our country, which directly affects the safety of the ecological environment and human health. [0003] In recent years, there have been many researches and applications on the harmlessness and reduction of res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/10B01J20/20B01J20/28B01J20/30C10L5/46B01D53/02C02F1/28
CPCB01D53/02B01J20/20B01J20/28009B01J2220/4887C02F1/283C02F11/00C02F11/10C02F2303/06C10L5/46Y02E50/10Y02E50/30
Inventor 高品薛罡钱雅洁金雅雯刘保江刘振鸿李响陈红
Owner DONGHUA UNIV
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