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Preparation method of activated carbon, and activated carbon

A technology of activated carbon and carbonization, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of poor adsorption capacity of activated carbon, and achieve the effect of small impact on strength, reducing pollution and reducing production costs.

Pending Publication Date: 2021-06-11
城康材料技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The activated carbon obtained by this method has poor adsorption capacity

Method used

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  • Preparation method of activated carbon, and activated carbon

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preparation example Construction

[0025]

[0026] The preparation method of activated carbon of the present invention comprises the following steps: (1) the step of raw material mixture; (2) the step of granulation, aging and dehydration; (3) the step of charring activation; and optionally, (4) pyrolysis gas Steps to reuse.

[0027] Raw material mixture steps

[0028] The sludge particles and the agricultural and forestry waste particles are dry mixed to obtain a first mixture. The water content of the sludge particles of the present invention is ≤10wt%. The particle size of sludge particles is less than or equal to 200 mesh. Particle size is determined by sieving. Dry mixing can be performed in a kneader. The dry mixing time may be 5-30 minutes; preferably 7-20 minutes; more preferably 8-15 minutes. This helps to mix the sludge particles with the agricultural and forestry waste particles, thereby increasing the iodine adsorption value of the activated carbon. In the prior art, sludge particles with h...

Embodiment 1～6 and comparative example 1～2

[0054] (1) drying and grinding pretreated sludge with a moisture content of less than 60 wt%, to obtain sludge particles with a moisture content of less than or equal to 10 wt% and able to pass through a 200-mesh sieve; crush the corn stalks, pass through a 200-mesh sieve, Corn stover particles passing through a 200-mesh sieve were obtained.

[0055] (2) Sending the sludge granules and corn stalk granules into a kneader for dry mixing for 10 minutes to obtain a first mixture; adding tar and water to the first mixture, and wet mixing for 30 minutes to obtain a second mixture.

[0056] (3) The second mixture is granulated by a granulator to make cylindrical composite sludge particles (particle diameter is 6-10mm, length is 10-30mm); the composite sludge particles are air-dried at 25°C for 24h, The composite sludge particles are aged and dehydrated to obtain aged composite sludge particles.

[0057] (4) Send the aged composite sludge particles into the integrated carbonization a...

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Abstract

The invention discloses a preparation method of activated carbon, and the activated carbon. The preparation method comprises the following steps: (1) carrying out dry mixing on sludge particles with the water content of less than or equal to 10wt% and agricultural and forestry waste particles to obtain a first mixture; and wet-mixing the first mixture, a binder and water to obtain a second mixture, wherein based on the second mixture, the use amount of the sludge particles is 40-60 wt%, the use amount of the agricultural and forestry waste particles is 15-30 wt%, the use amount of the binder is 10-30 wt%, and the use amount of the water is 3-20 wt%; (2) preparing the second mixture into composite sludge particles, and aging and dehydrating the composite sludge particles to obtain aged composite sludge particles; and (3) carbonizing the aged composite sludge particles to obtain raw material carbon and pyrolysis gas, activating raw material carbon in the presence of water vapor for 80-250 minutes, and then cooling to obtain the activated carbon. The activated carbon obtained by the method is high in iodine adsorption value.

Description

technical field [0001] The invention relates to a preparation method of activated carbon and the activated carbon. Background technique [0002] Sludge is a derivative of sewage treatment. It usually contains pathogenic microorganisms, parasite eggs, harmful heavy metals and a large number of refractory substances. If it is not treated thoroughly, it will cause secondary pollution to the environment. Sludge treatment and disposal refers to the whole process in which sludge is treated by unit process combination to achieve the purpose of "reduction, stabilization, harmlessness, and resource utilization". Among them, the process of sludge treatment includes sludge concentration, digestion, dehydration, composting and drying. Sludge disposal is to make the treated sludge or sludge products achieve long-term stable The final consumption method that has no adverse impact on the ecological environment. Sludge disposal mainly includes landfill, incineration, land utilization and b...

Claims

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Application Information

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IPC IPC(8): C01B32/324C01B32/336
CPCC01B32/324C01B32/336
Inventor 童裳慧王春霞
Owner 城康材料技术有限公司
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