Method for accelerating microwave pyrolytic process of oily sludge by pyrolyzing residue thereof

An oily sludge and microwave technology, which is used in the pyrolysis treatment of sludge and by-product vaporization, can solve the problem of inability to achieve oily sludge, sludge reduction and resource treatment, and inability to achieve oily sludge and sludge pyrolysis. The temperature and microwave pyrolysis process are long and other problems, so as to achieve the effect of shortening the pyrolysis time, low cost, and widespread use.

Inactive Publication Date: 2010-08-11
SINOPEC PETROLEUM ENG DESIGN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of sufficient substances beneficial to microwave adsorption in oil sludge or sludge, the process of microwave pyrolysis of oil sludge or sludge is very long, and even the pyrolysis of oil sludge and sludge cannot be achieved within a long time. high temperature, low treatment efficiency and high energy consumption, it is impossible to realize the reduction and recycling of oil sludge and sludge
Usually, activated carbon is used as a microwave absorber, and the method of adding activated carbon is used to promote the microwave pyrolysis process, and the cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Firstly, the oil sludge was subjected to microwave pyrolysis under the condition of nitrogen filling, and then microwave incineration was carried out at 700°C for 15 minutes to obtain microwave residues; secondly, microwave incineration residues of oil sludge mass of 1.0% were added to the oil sludge with a water content of 70%, and the microwave incineration residue was added to the oil sludge with a water content of 70%. Under nitrogen conditions, the microwave pyrolysis time can be shortened to about 2 hours. If the addition of residue is increased to 5%, the microwave pyrolysis time of oil sludge with a water content of 70% can be shortened to less than 5 seconds, the microwave pyrolysis process of oil sludge basically disappears, and the microwave incineration process is directly entered, and finally residue is obtained. The residue can also be mixed with oil sludge in proportion to use.

Embodiment 2

[0009] Sludge was subjected to microwave pyrolysis under nitrogen-filled conditions, and then microwave incineration was carried out at 850°C for 5 minutes to obtain microwave residue; 1.0% of sludge mass was added to sludge with a moisture content of 70% to obtain microwave incineration residue. The time of microwave pyrolysis can be shortened to about 3 hours under the condition of nitrogen filling. If the amount of residue added is increased to about 4.5%, the microwave pyrolysis time of sludge with a moisture content of 70% can be shortened to within 30 minutes; after about 30 minutes of microwave pyrolysis, the temperature of the sludge continues to rise and enters microwave incineration Process; After incineration, microwave residues are obtained. The microwave residue can also be mixed with oil sludge in proportion for use.

Embodiment 3

[0011] Adding 1.0% of the sludge microwave incineration residue obtained in Example 1 to the sludge with a water content of 70% can also shorten the microwave pyrolysis time to about 2 hours under nitrogen filling conditions. If the addition of residue is increased to 5%, the microwave pyrolysis time of oil sludge with a water content of 70% can be shortened to less than 5 seconds, the microwave pyrolysis process of oil sludge basically disappears, and the microwave incineration process is directly entered, and finally residue is obtained. The residue can also be mixed with oil sludge in proportion to use.

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Abstract

The invention discloses a method for accelerating the microwave pyrolytic process of oily sludge by pyrolyzing residue thereof, which comprises the following steps: carrying out microwave pyrolysis on the oily sludge or sludge under the condition of nitrogenization, controlling the temperature to be 700-850 DEG C and performing microwave incineration for 5-15min to obtain solid microwave residue; mixing the microwave residue with the oily sludge or the sludge evenly, wherein the weight of the microwave residue is 0.5-5% of the oily sludge or the sludge; and then carrying out microwave pyrolysis on the oily sludge or the sludge under the condition of nitrogenization. The invention can accelerate the pyrolytic process of the oily sludge or the sludge, shorten the pyrolytic time, effectively save the energy consumption of the oily sludge or the sludge processing, and improve the processing efficiency; the residue after the microwave pyrolysis can be recycled; and the method of the invention has low cost, is economical and can be popularized and utilized.

Description

technical field [0001] The invention relates to a method for microwave pyrolysis of oil sludge, in particular to a method for accelerating the microwave pyrolysis process of oil sludge by using cheap self-pyrolysis residues, which realizes the energy saving of oil sludge or sludge microwave pyrolysis, and improves the efficiency of microwave thermal decomposition. solution efficiency. Background technique [0002] The pyrolysis of oil sludge or sludge generally uses traditional methods for indirect heating pyrolysis. This method has the disadvantages of high energy consumption, easy coking, and the recovered liquid oil contains relatively high aromatic compounds. Due to microwave pyrolysis, there are dual effects of pyrolysis and microwave catalysis. Therefore, using microwave technology to pyrolyze oil sludge and sludge has become a new pyrolysis technology. However, due to the lack of sufficient substances beneficial to microwave adsorption in oil sludge or sludge, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10
CPCY02W10/40
Inventor 雍兴跃张建祝威侯影飞屈一新王际东陈远超张丁
Owner SINOPEC PETROLEUM ENG DESIGN
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