A method for preparing magnetic activated carbon from municipal sludge

A technology of magnetic activated carbon and municipal sludge, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of cumbersome preparation process of magnetic activated carbon, uneven distribution of activated carbon magnetic particles, high cost of activation reagents, etc., and achieve production Low cost, uniform distribution, and the effect of reducing production costs

Inactive Publication Date: 2015-09-30
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] The object of the present invention is to provide a method for preparing magnetic activated carbon using municipal sludge as a raw material in order to solve the above-mentioned technical problems such as the cumbersome preparation process of magnetic activated carbon, the high cost of activation reagents, the uneven distribution of the obtained activated carbon magnetic particles in the carrier, and the ease of agglomeration.

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  • A method for preparing magnetic activated carbon from municipal sludge
  • A method for preparing magnetic activated carbon from municipal sludge
  • A method for preparing magnetic activated carbon from municipal sludge

Examples

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Embodiment 1

[0029] A method for preparing magnetic activated carbon from municipal sludge, specifically comprising the following steps:

[0030] (1) Take 1L of municipal sludge from the secondary settling tank and place it in a 1.5L electrolytic cell with negative and positive poles, add 5g of sodium sulfate to the municipal sludge, and add sodium sulfate to the municipal sludge , and then carry out electrolytic treatment for 30 minutes;

[0031] Described electrolytic treatment is to use electric mixer to stir and control rotating speed to be 60rpm, electrolytic voltage is 20V, and electric current is electrolyzed under the condition of 1A;

[0032] In the electrolytic cell with two poles of cathode and anode, the distance between cathode and anode plates is 3 cm;

[0033] In the described electrolytic cell, the cathode plate is a titanium plate, and the anode plate is an iron plate;

[0034] The urban sludge moisture content is 99.1%;

[0035] (2) Centrifuge the municipal sludge afte...

Embodiment 2

[0042] A method for preparing magnetic activated carbon from municipal sludge, specifically comprising the following steps:

[0043] (1) Take 1L of urban sludge from the primary sedimentation tank and place it in a 1.5L electrolytic cell with negative and positive electrodes, add 5g of sodium sulfate to the sludge per liter of urban sludge, and add sodium sulfate to the sludge. Then carry out electrolytic treatment for 20min;

[0044] The electrolysis treatment is aeration and agitation, the electrolysis voltage is 25V, and the electrolysis is carried out under the condition of 1.3A current;

[0045] The aeration and agitation is performed by using an air pump for aeration and agitation, and the aeration flow rate is 1.2L / min;

[0046] In the electrolytic cell with two poles of cathode and anode, the distance between cathode and anode plates is 2cm;

[0047] In the described electrolytic cell, the cathode plate is a titanium plate, and the anode plate is an iron plate;

[0...

Embodiment 3

[0054] A method for preparing magnetic activated carbon from municipal sludge, specifically comprising the following steps:

[0055] (1) Take 1L of urban sludge from the secondary sedimentation tank and place it in a 1.5L electrolytic cell with negative and positive electrodes, add 5g of sodium sulfate to the sludge per liter of urban sludge, and add sodium sulfate to the sludge. Then use a stabilized power supply to carry out electrolytic treatment for 30 minutes;

[0056] Described electrolytic treatment is to use electric mixer to stir and control rotating speed to be 80rpm, electrolytic voltage is 30V, and electric current is electrolyzed under the condition of 1.8A;

[0057] In the electrolytic cell with two poles of cathode and anode, the distance between cathode and anode plates is 5 cm;

[0058] In the described electrolytic cell, the cathode plate is a titanium plate, and the anode plate is an iron plate;

[0059] The urban sludge moisture content is 99.0%;

[0060...

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Abstract

The invention discloses a method for preparing magnetic activated carbon from municipal sludge. The method comprises the steps of putting municipal sludge in a primary sedimentation tank or secondary sedimentation tank into an electrolytic cell with an anode and a cathode, adding sodium sulfate and then electrolyzing; separating the electrolyzed municipal sludge through centrifuging, drying obtained filter cakes at the temperature controlled at 105DEG C, and carbonizing the obtained precursor of the municipal sludge in a tubular furnace at the temperature controlled at 600-650DEG C under the protection of high-purity nitrogen; and then naturally cooling to room temperature after carbonization is ended, repeatedly washing sequentially by 0.5moL / L dilute sulphuric acid water solution and deionized water till the pH of effluent is constant at 6.1-6.7, and carrying out vacuum drying at the temperature controlled at 65DEG C so as to obtain the magnetic activated carbon. The method has the characteristics of simple processes and relatively low production cost; the prepared magnetic activated carbon has high specific surface area, is porous, has uniformly distributed magnetic particles in a carbon carrier, and has relatively good magnetic responsibility.

Description

technical field [0001] The invention belongs to the field of solid waste resource treatment, and in particular relates to a method for preparing magnetic activated carbon by using municipal sludge. Background technique [0002] In recent years, with the acceleration of urbanization in my country and the improvement of urban sewage treatment rate, the output of sludge has increased dramatically. Studies have shown that sludge has the dual nature of pollution and resource. First of all, if the sludge is discharged in an orderly manner without treatment, it will pollute surface water, groundwater, soil and the atmospheric environment; in addition, sludge contains a large amount of organic matter, such as protein, polysaccharide and cellulose, etc., which can be used as secondary resources. use. At present, feasible sludge resource utilization technologies include sludge composting and land use, sludge anaerobic gas production, sludge as building materials, and sludge pyrolysi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08C01B32/324
Inventor 谷麟张道方朱南文袁海平许智华袁时珏李亚如
Owner UNIV OF SHANGHAI FOR SCI & TECH
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