Technique for preparing activated carbon with powdered coal pyrolysis powdered coke

A technology for preparing activated carbon and process methods, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as energy waste, environmental dust pollution, and rising production costs, and achieve improved consolidation strength and simple preparation processes , Increase the effect of added value

Active Publication Date: 2013-10-16
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Not only caused a lot of energy waste, increased production costs, and decreased economic benefits, but more importantly, coke powder piled up in the open air, exposed to wind and sun, and

Method used

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  • Technique for preparing activated carbon with powdered coal pyrolysis powdered coke

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Mix phenolic resin, medium-temperature coal tar pitch, water glass, and diatomaceous earth in a weight ratio of 30:60:6:4 to obtain a composite adhesive. Grind the coke powder to less than 0.5mm; sprinkle evenly the adhesive on the surface of the coke powder, stir in the mixer for 25 minutes, and spray an appropriate amount of water mist during the stirring process; : Mix evenly in a ratio of 5, send the evenly stirred coke powder and adhesive mixture into an extruder to prepare a cylinder with a diameter of 5mm and a length of 20mm, and place it at room temperature for curing for 30 hours; the cured product is carbonized at 800°C 3h, and further activated by passing water vapor in an activation furnace at 600°C for 3h to obtain a columnar activated carbon product.

Embodiment 2

[0045] First, prepare modified coal tar pitch: uniformly mix dibutyl phthalate, dioctyl phthalate, stearic acid and coal tar pitch in a weight ratio of 3:3:4:90 to obtain a modified coal tar pitch.

[0046] Then, mix polyvinyl alcohol, epoxy resin, modified coal tar pitch, water glass, cement, diatomaceous earth, and quicklime according to the ratio of 4:25:65:3:1:1:1 by weight to obtain a composite adhesive Adhesive. Grind the coke powder to 0.05mm; sprinkle evenly the binder on the surface of the coke powder, stir in the mixer for 35 minutes, spray an appropriate amount of water mist during the stirring process; the weight percentage of coke powder and binder is 92:8 Mix evenly, cold press the evenly stirred coke powder and binder mixture into a ball with a diameter of 10mm, and place it at room temperature for curing for 24 hours; after the cured product is carbonized at 600°C for 4 hours, it is further activated by KOH activation method The activation time in the furnace...

Embodiment 3

[0048] Mix polyvinyl acetal, hydroxymethyl cellulose, diatomaceous earth, and pottery clay uniformly in a weight ratio of 32:60:4:4 to obtain a composite adhesive. Crush the coke powder to the components between 0.1mm-0.5mm; sprinkle the adhesive evenly on the surface of the coke powder, stir in the mixer for 30min, and spray an appropriate amount of water mist during the stirring process; coke powder, bonding The agent is mixed evenly according to the ratio of 90:10 by weight, and the uniformly stirred coke powder and adhesive mixture are cold-pressed into a ball with a diameter of 12mm, and placed at room temperature for curing for 36h; the cured product is carbonized at 1000°C for 2h , using the KOH activation method to further pass water vapor into the activation furnace for activation at an activation temperature of 800 ° C for 1.5 h to obtain spherical activated carbon products.

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Abstract

The invention discloses a technique for preparing activated carbon with powdered coal pyrolysis powdered coke. The technique comprises the steps as follows: 1) shattering powdered coke; 2) mixing 90-95 percent of organic components and 5-10 percent of inorganic components and obtaining a compound adhesive; 3) uniformly mixing the 90-95 percent of organic components and 5-10 percent of inorganic components; 4) performing cold pressing or extruding of a mixture of the powdered coke and the compound adhesive to form particles; 5) solidifying the formed particles; 6) carbonizing the solidified and formed particles; 7) performing activation of the carbonized product to obtain a ball-shaped or columnar activated carbon product. The technique improves solidification strength by adopting the novel compound adhesive and effectively solves the breaking problem during carbonization and activation. The technique is simple, the operation is convenient, the comprehensive utilization of the powdered coke is achieved, the added value is increased, and a certain economic benefit is obtained. The activated carbon prepared by the technique can be applied in the fields of gas separation, sewage treatment, flue gas desulfuration and the like.

Description

technical field [0001] The invention relates to a process for utilizing pulverized coal by-product coke powder, in particular to a method for preparing activated carbon by pyrolyzing coke powder from pulverized coal. Background technique [0002] Coke powder is a by-product produced by coking, metallurgy, chemical industry, calcium carbide and other production enterprises. It is discarded because of its small particle size and does not meet the production process requirements. In recent years, the coal chemical industry has developed rapidly, and the coke powder produced by the new pulverized coal pyrolysis technology is even greater. At present, most of the coke-consuming enterprises in our country have not found an effective solution to the formation of coke powder, so the coke powder can only be treated as a low-grade fuel at a low price. Not only caused a lot of energy waste, increased production costs, and decreased economic benefits, but more importantly, coke powder ...

Claims

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Application Information

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IPC IPC(8): C01B31/10C01B31/12C01B32/324C01B32/342
Inventor 付东升郑化安杨阳张云王小宪
Owner SHAANXI COAL & CHEM TECH INST
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