A method for preparing sludge activated carbon by activating municipal sludge with urine

A technology for preparing activated carbon and municipal sludge, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of low specific surface area of ​​activated carbon and large consumption of activating reagents, and achieve stable product quality, significant technological progress, and benefits. Good results

Inactive Publication Date: 2019-06-28
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a kind of method that utilizes urine activated sludge to prepare activated carbon, described this method that utilizes urine activated sludge to prepare activated carbon will solve the pollution problem in the prior art. The specific surface area of ​​activated carbon prepared from mud is low, and the activation process needs to consume a large amount of activation reagents.

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  • A method for preparing sludge activated carbon by activating municipal sludge with urine
  • A method for preparing sludge activated carbon by activating municipal sludge with urine

Examples

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Effect test

Embodiment 1

[0025] A method for preparing sludge activated carbon by activating municipal sludge with urine, specifically comprising the following steps:

[0026] (1) Add 15g of dried sludge from urban sewage plant to 100g of urine containing 15% urea and mix for 60 minutes;

[0027] The moisture content of the dry sludge of the urban sewage plant is 2.7%;

[0028] Described mixing is to stir with electric mixer control rotating speed 120rpm;

[0029] (2) Centrifuge the mixed municipal sludge at a controlled speed of 4000rpm, control the ambient temperature of the resulting filter cake at 105°C, and dry it for 24 hours to obtain the precursor of municipal sludge;

[0030] (3) Under the protection environment of high-purity nitrogen, the obtained municipal sludge precursor was carbonized in a tube furnace at a controlled heating rate of 10°C / min to 600°C for 2 hours, and then naturally cooled to room temperature to be carbonized sludge;

[0031] (4) Put the carbonized sludge obtained in...

Embodiment 2

[0040] A method for preparing sludge activated carbon by activating municipal sludge with urine, specifically comprising the following steps:

[0041] (1) Add 20g of dried sludge from urban sewage plant to 100g of urine containing 15% urea and mix for 60 minutes;

[0042] The moisture content of the dry sludge of the urban sewage plant is 1.8%;

[0043] Described mixing is to stir with electric mixer control rotating speed 150rpm;

[0044] (2) Centrifuge the mixed municipal sludge at a controlled speed of 4000rpm, control the ambient temperature of the resulting filter cake at 105°C, and dry it for 24 hours to obtain the precursor of municipal sludge;

[0045] (3) Under the protection environment of high-purity nitrogen, the obtained municipal sludge precursor was carbonized in a tube furnace at a controlled heating rate of 20°C / min to 400°C for 2 hours, and then naturally cooled to room temperature to be carbonized sludge;

[0046] (4) Put the obtained carbonized sludge in...

Embodiment 3

[0052] A method for preparing sludge activated carbon by activating urban sludge with urine, specifically comprising the following steps:

[0053] (1) Add 20g of dried sludge from urban sewage plant to 100g of urine containing 10% urea and mix for 60 minutes;

[0054] The moisture content of the dry sludge of the urban sewage plant is 3.6%;

[0055] Described mixing is to stir with electric mixer control rotating speed 130rpm;

[0056] (2) Centrifuge the mixed municipal sludge at a controlled speed of 4000rpm, control the ambient temperature of the resulting filter cake at 105°C, and dry it for 24 hours to obtain the precursor of municipal sludge;

[0057] (3) Under the protection environment of high-purity nitrogen, the obtained municipal sludge precursor was carbonized in a tube furnace at a controlled heating rate of 20°C / min to 600°C for 2 hours, and then naturally cooled to room temperature to be carbonized after carbonization sludge;

[0058] (4) Put the obtained carb...

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Abstract

The invention provides a method for preparing active carbon by using urine to activate municipal sludge. The method comprises the following steps: mixing urine with dry sludge in a municipal sewage plant; carrying out centrifuging separation and drying on the mixed sludge, and carrying out carbonization on an obtained municipal sewage former body in a tube furnace in a nitrogen protection environment; after the carbonization is finished, controlling the temperature of the carbonized sludge obtained by naturally cooling to room temperature in a water steam protection environment for activation; after the activation is finished, naturally cooling to room temperature, then washing with a diluted hydrochloric acid water solution and deionized water in sequence until the pH value of the eluate is constant to be 6.7 to 7.0, and carrying out vacuum drying to obtain the active carbon. The preparation method provided by the invention has the characteristics of simple operation, easily obtained raw materials, low production cost and the like, and the obtained active carbon is high in specific surface area, developed in bore diameter and stable in product quality.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a method for treating solid waste materials, in particular to a method for preparing activated carbon by using urine activated sludge. Background technique [0002] In recent years, with the increase in the amount of municipal sewage and industrial sewage treatment in my country, the amount of sludge generated has also increased sharply. Sludge has a high water content and contains a large amount of toxic and harmful pathogenic microorganisms and heavy metals. If it is not properly treated, it will cause serious environmental pollution if it is disposed of randomly. At present, domestic and foreign sludge disposal methods mainly include sludge landfill, sludge incineration, marine landfill, and sludge composting. Sludge incineration requires high cost to build incineration facilities, and a large amount of particulate matter and toxic and harmful gases will be produced during the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324
CPCC01P2004/03C01P2006/12C01P2006/14C01P2006/16
Inventor 谷麟张道方闻海峰李冰莲吴思帆俞海祥朱南文李程序卓琼芳
Owner UNIV OF SHANGHAI FOR SCI & TECH
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