A method for preparing super activated carbon from oily sludge

A technology for activated carbon and sludge, which is applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as inability to achieve, achieve economical feasibility and economy, and the preparation process is simple to operate and simple to prepare. Effect

Active Publication Date: 2011-12-07
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​activated carbon prepared by traditional methods is generally less than 1000m 2 / g, far from meeting the needs of the growing fields of environmental protection, electronics, medicine, chemical industry and military

Method used

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  • A method for preparing super activated carbon from oily sludge
  • A method for preparing super activated carbon from oily sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare conditioning treatment agent: calcium chloride and OP-10 surfactant are mixed by mass ratio 30: 0.6, then add water and be mixed with aqueous solution, the concentration of calcium chloride and OP-10 surfactant mixture aqueous solution is 35%; Namely The mass ratio of the mixture of calcium chloride and OP-10 surfactant to water is 35:65.

[0031] Prepare composite activator: composite activator is potassium hydroxide (KOH) and potassium carbonate (K 2 CO 3 ) mixture with a mass ratio of 10:2.

[0032] Sewage treatment station sludge with a water content of 86.8%. According to the mass ratio of sludge to medicine 10:3, add conditioning treatment agent for dehydration treatment, send the dehydrated sludge with a moisture content of 68% into the carbonization furnace, and heat up to 450°C at a speed of 12°C / min under the isolation of air for carbonization. The carbonization time is 2 hours; the dry distillation gas generated during carbonization is collected an...

Embodiment 2

[0035] Prepare composite activator: composite activator is solid sodium hydroxide (NaOH) and sodium carbonate (NaOH) 2 CO 3 ) mixture with a mass ratio of 10:1.

[0036] Send the oilfield tank bottom mud with a moisture content of 63.7% into the carbonization furnace, and heat it up to 500°C at a rate of 8°C / min in the absence of air for carbonization. The carbonization time is 4 hours. After the carbonization is completed, the furnace temperature drops to room temperature. Take out the carbonization; The carbonization is broken to 200 orders, and the carbonization after the crushing is immersed in the prepared 20% hydrogen peroxide (H 2 o 2 ) solution, carry out pre-oxidation treatment, stir continuously at room temperature for 4 hours to make it evenly mixed, wash with water until neutral after the reaction stops, and dry for 6 hours at 110°C; 2 mass ratio mixed evenly, in N 2 Under the atmosphere, the temperature was raised to 200°C at a speed of 15°C / min for pre-activati...

Embodiment 3

[0039] Prepare conditioning treatment agent: mix solid sodium chloride and OP-10 surfactant at a mass ratio of 30:0.4, then add water to prepare an aqueous solution with a mass percent concentration of 48%.

[0040] Prepare composite activator: composite activator is potassium hydroxide (KOH) and potassium carbonate (K 2 CO 3 ) mixture with a mass ratio of 10:5.

[0041] The oilfield sewage treatment station sludge with a water content of 90.5% is dehydrated by adding a conditioning treatment agent at a mass ratio of 10:1 to the sludge, and the dehydrated sludge with a water content of 66% is sent to the carbonization furnace. The speed of ℃ / min is raised to 450 ℃ for carbonization, and the carbonization time is 2 hours; after the carbonization is completed, after the furnace temperature drops to room temperature, take out the carbonized product, crush the carbonized product to 230 mesh, and crush the crushed carbonized product according to the mass ratio of 1:4 Immerse in p...

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Abstract

The invention provides a method for preparing super activated charcoal from oily sludge, and the method is applied to recycling of oily solid wastes in petroleum and petrochemical enterprises. The method comprises the following steps: adding a modifying treatment agent into the oily sludge for dewatering and oil collection treatment; then heating the dewatered oily sludge in the absence of air toa certain temperature at a rate of 2-20 DEG C / min for charring; after crushing the charred product to a set size, carrying out pre-oxidation; uniformly mixing the pre-oxidized charred product with compound activator powder at a certain mass ratio, and heating the mixture to a specified temperature in an inert atmosphere at a rate of 2-20 DEG C / min for pre-activation and activation; and soaking the cooled charred product in an acid solution, rinsing with distilled water to be neutral and then drying to obtain an activated charcoal product. By virtue of modifying, charring, oxidation, activation, washing and drying steps, the resulting activated charcoal has the advantages of strong adsorption performance and high specific surface area; and the iodine adsorption value and specific surface area of the obtained activated charcoal are higher than those of ordinary activated charcoal.

Description

technical field [0001] The invention relates to the technical field of oily solid waste treatment and resource utilization in petroleum and petrochemical enterprises, in particular to a method for preparing super activated carbon from oily sludge. Background technique [0002] Oily sludge is the main pollutant in the production of petroleum and petrochemical industries. It is a hazardous waste stipulated by the state and a valuable secondary resource. The "Waste Mineral Oil Recycling and Utilization Pollution Control Technical Specifications (HJ 607-2011) requires that "oily sludge and oily sludge with an oil content greater than 5% should be recycled." Domestic treatment of oily sludge mainly includes incineration, separation, landfill, biodegradation, etc., but all of them have disadvantages such as unsatisfactory treatment effect and high treatment cost. Therefore, from the perspective of environmental protection and circular economy, it is of great practical significanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C02F11/00
Inventor 邓皓王蓉沙张明栋任雯王万福刘光全张建明岳勇刘鹏陈梅梅刘晓辉于凤萍程泽生
Owner BC P INC CHINA NAT PETROLEUM CORP
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