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System and method for treating oil-containing sludge

A technology for oily sludge and sludge is applied in the field of systems for treating oily sludge, which can solve the problems of poor water absorption and air permeability, deterioration of atmospheric environment quality, occupation of large land and other problems, and achieve the effect of eliminating harm

Active Publication Date: 2012-04-11
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The danger is that if the method of stacking or landfilling is adopted, a large amount of land will be occupied
Moreover, if these substances are in contact with the soil for a long time, it will also cause soil compaction, poor water absorption and air permeability, which is not conducive to the growth of soil microorganisms, and will also cause deterioration of surface water, groundwater and atmospheric environment quality.

Method used

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  • System and method for treating oil-containing sludge
  • System and method for treating oil-containing sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Use a system consisting of a sludge pump 1, an air flotation concentration device 2, a screw conveying device 3, a thermal extraction device 4, an induced draft fan 5, a cyclone separation device 6, a dust removal device 8, a granulation device 7 and a fractionation device 9 to treat oily dirt Mud is processed.

[0062] Wherein, the oily sludge is waste resin, and 100 parts by weight of waste resin contains 35 parts by weight of organic matter, 55 parts by weight of water and 10 parts by weight of solid.

[0063] The oily sludge is supplied to the air flotation concentration device 2 through the sludge pump 1, and the pumped sludge flow rate of the sludge pump 1 is 20m 3 / h, the outlet pressure of the sludge pump 1 is 0.5MPa.

[0064] Oily sludge is carried out air flotation concentration in the air flotation concentration device 2, the air flotation concentration device 2 includes a feed port 21, a water discharge port 22, a gas discharge port 24 and a sewage discharg...

Embodiment 2

[0073] Process oily sludge according to the method of embodiment 1, the difference is: the pumping sludge flow rate of sludge pump 1 is 30m 3 / h, the outlet pressure of the sludge pump 1 is 0.7MPa; when the air flotation concentration is added, the air bubbles with a particle size of 30-80 μm are added and the content of the air bubbles in the area where the sludge is in contact with the air bubbles is 10.5 mg / L; The water content of the sludge material discharged from the mud discharge port 25 is 85%; the water content of the sludge material discharged from the discharge port 33 of the screw conveyor 3 is 53%; the treatment capacity of the air flotation concentration device 2 is 30m 3 / h; the flow of water discharged from the outlet 22 is 10.5m 3 / h, the pressure of the pressure reducing valve is set to 0.32MPa of the outlet pressure of the sludge pump 1; the inlet wind speed of the cyclone separation device 6 is 10m / s; the pressure drop is 0.075Mpa.

Embodiment 3

[0075] Process oily sludge according to the method of embodiment 1, the difference is: the pumping sludge flow rate of sludge pump 1 is 40m 3 / h, the outlet pressure of the sludge pump 1 is 1.0MPa; air bubbles with a particle size of 10-40 μm are added during air flotation concentration; the water content of the sludge material discharged from the sludge discharge port 25 is 70%; The water content of the sludge material discharged from the outlet 33 of the conveying device 3 is 50%; the processing capacity of the air flotation concentration device 2 is 40m 3 / h; the flow of water discharged from the outlet 22 is 20m 3 / h, the pressure of the pressure reducing valve is set to 0.105MPa of the outlet pressure of the sludge pump 1; the inlet wind speed of the cyclone separation device 6 is 12m / s; the pressure drop is 0.1Mpa.

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Abstract

The invention provides a system and a method for treating oil-containing sludge, according to a treating process for oil-containing sludge, the system comprises a air flotation thickening device, a thermal extraction device, a cyclone separator device, a dust removal device and a condensing fractionation device in order, wherein the air flotation thickening device is used for performing air flotation thickening on the oil-containing sludge to generate sludge materials and waste water; the thermal extraction device is used for thermally extracting the sludge materials; the cyclone separator device is used for separating the products by thermal extraction to a mixed gas and a solid dry substance; the dust removal device is used for removing the dust of the mixed gas; the condensing fractionation device is used for carrying out condensing fractionation on the gas which is passed through the dust removal device. The invention also provides a method for treating oil-containing sludge. The system and method of the invention combine the advantages of condensing fractionation and thermal extraction, and are capable of thoroughly and cleanly treating the oil-containing sludge in oil refinery, eliminating harm of the oil-containing sludge on environment, and recovering the precious resources. The invention has the advantages of high efficiency, economy and environmental protection.

Description

technical field [0001] The present invention relates to systems and methods for treating oily sludge. Background technique [0002] Oil refineries will form a certain amount of oily sludge during the production process, such as heavy oil catalysis, hydrocracking, reforming, hydrogen production, hydrofining and other processes will produce a large amount of spent catalysts, catalytic cracking combined units, hydrofining units A large amount of waste alkali residue will be produced, aromatics extraction unit and reforming unit will produce waste desorbent (adsorption) agent, delayed coking unit will produce coke sludge, storage and transportation system, sewage treatment plant will produce a large amount of "three muds" ( namely oil sludge, scum and residual activated sludge). In short, there are many sources, types and quantities of oily sludge in refineries. [0003] Components in refinery oily sludge include spent catalysts, spent activated carbon, spent ceramic balls, sp...

Claims

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Application Information

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IPC IPC(8): C02F11/00
Inventor 王建文汪华林李文杰马良俞惠庆应唐进胡江青屠伟龙林霄红
Owner CHINA PETROLEUM & CHEM CORP
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