Unlock instant, AI-driven research and patent intelligence for your innovation.

A physical regeneration process of powdered activated carbon

A technology of powdered activated carbon and physical method, which is applied in filter regeneration, petroleum industry, separation method, etc., and can solve the problems of high energy consumption, difficult application and dangerous efficiency of microwave heating regeneration method

Inactive Publication Date: 2018-05-29
CHINA UNIV OF MINING & TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the energy consumption of the microwave heating regeneration method is too high, the equipment is not easy to solve, and because it is difficult to use steam reaction, the regeneration effect is not good, so it is difficult to apply in industry; the use of the rotary kiln direct thermal regeneration method has uneven heating of materials , and the activated air flow is easy to blow the carbon powder out, which brings danger and low efficiency; the eluent components used in the solution elution regeneration method will pollute the carbon, which is not conducive to the use of activated carbon, and the eluent is serious Pollutants, difficult to deal with at low cost
In view of the above reasons, the regeneration methods studied in the past are rarely used in industry, so it is urgent to study the physical regeneration process of waste powder activated carbon that can be actually used in industry.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (A) Put 100g of waste powdered activated carbon (dry basis), 2g of sodium carboxymethyl cellulose, and 10g of asphalt in a kneading and mixing equipment, then add 40g of water, and knead evenly to form a paste.

[0020] (B) Extrude the paste into carbon rods with a diameter of 4mm on the extruder to ensure that the surface of the carbon rods is smooth, free of vertical and horizontal cracks, lumpy materials, and no agglomeration. At this time, the sodium carboxymethyl cellulose aqueous solution is used as the guarantee of the initial cold state strength of the carbon strip.

[0021] (C) Heat and dry the carbon strips at 120°C to remove the moisture in the carbon strips, and make the carbon strips harden and have strength, which is convenient for the next process. After drying for 1.5 hours, the moisture in the carbon strips is controlled below 10%.

[0022] (D) Take out the dried carbon strips and activate them in a tubular converter at 700 °C for 30 min. During high ...

Embodiment 2

[0025] (A) Take 100g of dry waste powder activated carbon, in order to ensure that the material is not pulverized during the turning process, then take 1g of scallop powder and 5g of gas fertilizer coal and put them in the kneading and stirring equipment, add 35g of water, and knead evenly to form a paste body.

[0026] (B) Extrude the paste into carbon rods with a diameter of 5mm on the extruder to ensure that the surface of the carbon rods is smooth, free of vertical and horizontal cracks, lumpy materials, and no agglomeration. The regeneration process is then carried out under the properties of granular activated carbon.

[0027] (C) Dry the carbon strips at 150°C for 1 hour. After drying, the moisture in the carbon strips should be kept below 10%.

[0028] (D) Take out the dried carbon strips, and then activate them in a tube-type converter at 750°C for 25 minutes. The time depends on the regeneration degree. At this time, the gas-fertilized coal is used as the strength ...

Embodiment 3

[0031] (A) Put 100g of waste powdered activated carbon, 3g of squash powder, and 8g of gas-fertilized coal into the kneading and stirring equipment, then add 50g of water, and knead evenly to form a paste.

[0032] (B) Extrude the paste into carbon bars with a diameter of 6mm on a hydraulic forming machine to ensure that the surface of the carbon bars is smooth, free of vertical and horizontal cracks, lumpy materials, and no agglomeration.

[0033] (C) Dry the carbon strips at a temperature of 160°C for 1 hour. After drying, the moisture in the carbon strips should be kept below 10%.

[0034] (D) Take out the dried carbon strips and activate them in a tubular converter at 800 °C for 20 min.

[0035] (E) Take out the activated carbon strips, cool them down, and grind them to get the regenerated powdered activated carbon.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a physical regeneration process of powdered activated carbon, which includes the following specific steps: (A) the used waste powdered activated carbon (in terms of absolute dryness), organic binder, asphalt or strongly cohesive coal powder Ratio 100: 1‑3: 5‑10: 35‑50, add water, and then knead evenly to form a paste; (B) Extrude the above paste on the extruder to form a carbon rod with a diameter of 3‑6mm; ( C) Heat and dry the above-mentioned carbon strips at 120-180°C, so that the moisture in the carbon strips is controlled below 10%; (D) Place the dried carbon strips in an activation furnace at a temperature of 700-850°C Next, pass water vapor for activation; (E) Grind the activated carbon strips to obtain a powdered activated carbon regenerated product. It can be realized conveniently in industry, and has the advantages of energy saving, environmental protection, high efficiency and low cost.

Description

technical field [0001] The invention relates to a physical regeneration process of activated carbon, which is especially suitable for the regeneration of waste powder activated carbon. Background technique [0002] A large amount of powdered activated carbon is often used in the fields of petrochemical product production, pharmaceutical production, sugar liquid decolorization, etc. Due to the difficulty of regeneration, powdered activated carbon is often used for one-time use, and the activated carbon after use is disposed of as waste. In fact, these powdered activated carbons are mainly made of wood scraps, which are produced by chemical methods, and the production cost is very high. It is really wasteful to use them only once, and the waste carbon becomes hazardous waste, which causes the user's use cost to remain high. [0003] At present, there are many regeneration technologies for powdered activated carbon, such as thermal regeneration method, that is, by heating waste...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/34
Inventor 张双全张瑞平王文俊
Owner CHINA UNIV OF MINING & TECH