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Granular active carbon regeneration method

A technology of granular activated carbon and activated carbon, which is applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of environmental burial, toxic and harmful substances, pollution affecting people's health, etc., and avoid complicated processes and cycles. The effect of increased usage and simplified processes

Inactive Publication Date: 2019-10-22
南京安捷特环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Because granular activated carbon absorbs more toxic and harmful substances in the gas, if it is disposed of randomly, it will cause serious pollution and affect the health of the people. At present, most of them are landfilled, which will bury hidden dangers for the future environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for regenerating granular activated carbon, comprising the steps of:

[0021] 1) cleaning: waste and old granular activated carbon is put into organic solvent to clean, and described organic solvent is made up of toluene and acetone, and the mass ratio of described toluene and acetone is 1:15;

[0022] 2) pickling: the granular activated carbon after cleaning is put into dilute hydrochloric acid solution and soaked, and the concentration of described dilute hydrochloric acid is 2.5mol / L;

[0023] 3) Drying: Put the cleaned waste granular activated carbon into a drying chamber to dry completely;

[0024] 4) Pretreatment: pretreatment with ethanol, the granular carbon particles are soaked in ethanol with a volume fraction of 70%, and the soaking time is 2.5h;

[0025] 5) Carbonization: Put the pretreated granular activated carbon into the gas carbonization furnace through the spiral conveyor belt, raise the temperature to 700°C, and feed hot gas into the gas act...

Embodiment 2

[0030] A method for regenerating granular activated carbon, comprising the steps of:

[0031] 1) cleaning: waste and old granular activated carbon is put into organic solvent to clean, and described organic solvent is made up of toluene and acetone, and the mass ratio of described toluene and acetone is 4:18.5;

[0032] 2) pickling: the granular activated carbon after cleaning is put into dilute hydrochloric acid solution and soaked, and the concentration of described dilute hydrochloric acid is 2.8mol / L;

[0033] 3) Drying: Put the cleaned waste granular activated carbon into a drying chamber to dry completely;

[0034] 4) Pretreatment: pretreatment with ethanol, the granular carbon particles are soaked in ethanol with a volume fraction of 60-70%, and the soaking time is 3 hours;

[0035] 5) Carbonization: Put the pretreated granular activated carbon into the gas carbonization furnace through the screw conveyor belt, raise the temperature to 1000 ° C, and the heating rate is...

Embodiment 3

[0040] A method for regenerating granular activated carbon, comprising the steps of:

[0041] 1) Cleaning: Put the waste granular activated carbon into an organic solvent for cleaning. The organic solvent is composed of toluene and acetone, and the mass ratio of toluene and acetone is 1:18.5;

[0042] 2) pickling: the granular activated carbon after cleaning is put into dilute hydrochloric acid solution and soaked, and the concentration of described dilute hydrochloric acid is 2.6mol / L;

[0043] 3) Drying: Put the cleaned waste granular activated carbon into a drying chamber to dry completely;

[0044] 4) Pretreatment: pretreatment with ethanol, the granular carbon particles are soaked in ethanol with a volume fraction of 60-70%, and the soaking time is 2.9h;

[0045] 5) Carbonization: put the pretreated granular activated carbon into a gas carbonization furnace through a spiral conveyor belt, the temperature of carbonization is 900°C, and feed hot gas into the gas activation...

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PUM

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Abstract

The invention discloses a granular active carbon regeneration method, which comprises: 1) cleaning, 2) acid washing, 3) drying, 4) pretreatment, 5) carbonization, 6) waste gas collecting, 7) activation, and 8) cooling. According to the present invention, before waste active carbon is carbonized and activated, the waste active carbon is washed with an organic solvent to remove small-particle organic impurities, and soaking is performed with a dilute hydrochloric acid solution to remove part of impurities, such that no impurity exists in the subsequent operation, the complicated subsequent process is avoided, and the process is simplified; the recycling rate of the obtained granular active carbon after the regeneration process of the present invention is increased compared with the regenerated active carbon in the prior art; and the heat can be reused through the heat exchanger so as to avoid the waste of energy and the environmental pollution.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a method for regenerating granular activated carbon. Background technique [0002] As an efficient adsorbent for clean energy, granular activated carbon has provided great economic benefits for the storage and transportation of clean energy such as natural gas and hydrogen. At the same time, granular activated carbon is also widely used in gas refining: unpleasant odors in public or residential places, such as the smell of food in restaurants, paper smells and sweaty odors in libraries and offices, etc. are unpleasant, and granular activated carbon can be used to purify the room Air; industrial plants, such as food processing, pharmaceutical manufacturing or precision instrument rooms, contain smoke, dust and irritants in the air, which will affect the health of the staff or cause oxidation and corrosion of precision instruments. Granular activated carbon can be used to pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/20
CPCB01J20/3416B01J20/3475B01J20/3483B01J20/3458B01J20/20
Inventor 胡志杰陈红锋
Owner 南京安捷特环保科技有限公司
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