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A method of regenerating activated carbon

A technology of activated carbon and waste activated carbon, which is applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of secondary pollution of organic solvents, difficult practicability, secondary pollution of exhaust gas, etc., and achieves high-efficiency regeneration, The effect of improving yield and quality and regeneration efficiency, reducing thermal regeneration temperature and regeneration time

Active Publication Date: 2019-04-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the existing activated carbon regeneration methods have the following disadvantages: ①The loss of activated carbon is large; ②The adsorption capacity will decrease significantly after regeneration; ③The tail gas generated during regeneration will cause secondary pollution; ④The regeneration conditions are harsh and difficult to implement. , high cost, low economic benefit
[0006] In summary, the current mainstream of activated carbon regeneration technology is vacuum high temperature (above 300°C) regeneration and solvent regeneration. High temperature regeneration cannot avoid problems such as high energy consumption and large carbon loss, and the poor versatility of solvent regeneration can easily lead to secondary pollution by organic solvents, etc. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The method of regeneration activated carbon mainly comprises the following steps:

[0029] First, take the waste activated carbon (mainly containing organic matter and complex components, such as phenols, alcohols, benzene and its derivatives) after the industrial wastewater treatment of a domestic enterprise, wash the waste activated carbon 2 to 3 times with deionized water, and remove the waste activated carbon. The acidic substances and some soluble inorganic substances are filtered and separated;

[0030] Secondly, the activated carbon obtained by filtering and separating is mixed evenly with deionized water according to the liquid-solid ratio of 2:1 (mL / g, the same below), and mixed and heated in a high-pressure reactor at a heating temperature of 170 ° C and an air pressure of 8 atm , high temperature and pressure hold for 1h;

[0031] After heating, take out the material, filter, and dry in a vacuum oven at 105°C for 5-8 hours;

[0032] Finally, the obtained dr...

Embodiment 2

[0036] The method of regeneration activated carbon mainly comprises the following steps:

[0037] First, take the waste activated carbon after the industrial wastewater treatment of a domestic enterprise, wash the waste activated carbon with deionized water 2 to 3 times, remove the acidic substances and some soluble inorganic substances in it, and filter and separate;

[0038] Secondly, the activated carbon obtained by filtering and separating was mixed evenly with deionized water according to the liquid-solid ratio of 5:1, mixed and heated in a high-pressure reactor at a heating temperature of 200 °C, an air pressure of 15 atm, and a high-temperature pressure hold for 3 hours;

[0039] After heating, take out the material, filter, and dry in a vacuum oven at 105°C for 5-8 hours;

[0040] Finally, the obtained dried material is heated to 600°C in a high-temperature tube furnace, and held for 40 minutes to carry out a medium-temperature activation and regeneration reaction, and...

Embodiment 3

[0043] The method of regeneration activated carbon mainly comprises the following steps:

[0044] First, take the waste activated carbon after the industrial wastewater treatment of a domestic enterprise, wash the waste activated carbon with deionized water 2 to 3 times, remove the acidic substances and some soluble inorganic substances in it, and filter and separate;

[0045] Secondly, the activated carbon obtained by filtration and separation was mixed evenly with deionized water according to the liquid-solid ratio of 7:1, mixed and heated in a high-pressure reactor, the heating temperature was 190°C, the air pressure was 14atm, and the high-temperature pressure was maintained for 3 hours;

[0046] After heating, take out the material, filter, and dry in a vacuum oven at 105°C for 5-8 hours;

[0047] Finally, the obtained dried material is heated to 700°C in a high-temperature tube furnace, and held for 60 minutes to carry out a medium-temperature activation regeneration rea...

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Abstract

The invention discloses a method for regenerating activated carbon. Firstly, pretreatment is performed under relatively low temperature, and then the short-time activating regenerating reaction is performed. The two steps are synergic with each other, so that the temperature and time required by the traditional method for regenerating activated carbon are greatly reduced, the purposes of saving energy and reducing consumption can be achieved, and the yield, quality and regenerating efficiency of the activated carbon also can be increased.

Description

technical field [0001] The invention belongs to the regeneration field of waste activated carbon, and in particular relates to a method for regenerating activated carbon. Background technique [0002] Activated carbon regeneration refers to the process of removing the adsorbate adsorbed on the micropores of activated carbon by physical or chemical methods without destroying the original structure of activated carbon, and restoring its adsorption performance. At present, activated carbon regeneration methods mainly include ultrasonic regeneration method, electrochemical regeneration method, superfluid regeneration method, solvent regeneration method, oxidation regeneration method, thermal regeneration method, biological regeneration method, etc. Generally, the existing activated carbon regeneration methods have the following disadvantages: ①The loss of activated carbon is large; ②The adsorption capacity will decrease significantly after regeneration; ③The tail gas generated d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34B01J20/20
CPCB01J20/3416
Inventor 肖劲余柏烈仲奇凡袁杰姚桢张留运
Owner CENT SOUTH UNIV
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