Method for harmless treatment of oily sludge through preparation of coal water slurry

A harmless treatment, coal-water slurry technology, applied in water/sludge/sewage treatment, sludge treatment, dehydration/drying/concentrated sludge treatment, etc. Time-consuming and other problems, to achieve the effect of good combustion calorific value and significant economic benefits

Inactive Publication Date: 2018-09-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oily sludge contains a large amount of emulsified oil, slickable oil and dissolved oil. The heat of combustion is 1200-1500kcal / kg. It can be burned, but the investment and operation costs of incineration equipment are high, and the incineration utilization rate of single oily sludge is very low.
[0004] The conventional treatment method of oily sludge is outsourcing treatment after drying, and the cost is about 2,000 yuan / ton. restrict the development of enterprises
[0005] The patent "A Microbial Treatment Method for Oily Sludge" (Application No.: 201610519397.4) proposes a microbial treatment method for oily sludge. Microbial remediation agents are added to the oily sludge and mixed evenly, sprinkled and tilled until the oily sludge reaches the discharge Standards, patents directly use indigenous microorganisms in sludge to biodegrade petroleum substances, but it takes a long time and the treatment effect is unstable
"Experimental Research on the Production of Oil-Coal Water Slurry Using Oily Sludge" (Zhang Dasong, Oil and Gas Field Environmental Protection, 2010, 20(2):18-20) Using a viscosity reducer to reduce the viscosity of oily sludge and directly mixing it with coal powder Coal water slurry can realize the harmless treatment of oily sludge, but oily sludge will increase the viscosity of coal water slurry to a certain extent

Method used

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  • Method for harmless treatment of oily sludge through preparation of coal water slurry
  • Method for harmless treatment of oily sludge through preparation of coal water slurry
  • Method for harmless treatment of oily sludge through preparation of coal water slurry

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Add 40mg / L polyacrylamide to the oily sludge, stir well, press filter and dehydrate, then dry, the water content after drying is 5%.

[0042] According to the proportion, 59 parts of coal powder, 0.5 part of sodium lignosulfonate, 34.5 parts of water distribution and 6 parts of oily sludge after drying and dehydration were added to the mixer, and the stirring rate was kept at 500 rpm for 20 minutes to prepare coal water slurry.

[0043] The prepared coal-water slurry has good fluidity. After measurement, the viscosity of the coal-water slurry is 820mPa.S, and the solid content is 62%.

Embodiment 2

[0045] Add 55mg / L polyaluminum chloride to the oily sludge, stir well, press filter and dehydrate, and then dry, the moisture content after drying is 4.5%.

[0046] According to the proportion, 63 parts of coal powder, 0.5 part of sodium styrene sulfonate, 34.5 parts of water distribution and 2 parts of oily sludge after drying and dehydration were added to the mixer, and the stirring rate was kept at 300 rpm for 30 minutes to prepare coal water slurry.

[0047] The prepared coal-water slurry has good fluidity. After measurement, the viscosity of the coal-water slurry is 720mPa.S, and the solid content is 61.3%.

Embodiment 3

[0049] Add 60mg / L polyacrylamide to the oily sludge, stir well, press filter and dehydrate, and then dry, the moisture content after drying is 4.4%.

[0050] According to the proportion, 62 parts of coal powder, 0.5 parts of sodium lignosulfonate, 34.5 parts of water distribution and 3 parts of dried and dehydrated oily sludge were added to the mixer, and the stirring speed was kept at 350 rpm for 25 minutes to prepare coal water slurry.

[0051] The prepared coal-water slurry has good fluidity. After measurement, the viscosity of the coal-water slurry is 700mPa.S, and the solid content is 61%.

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Abstract

The invention relates to a method for harmless treatment of oily sludge through preparation of coal water slurry. The method comprises the following steps: adding a flocculating agent into oily sludge, carrying out sufficient stirring, and then carrying out dehydration and drying; mixing the dried oily sludge with coal dust to prepare coal water slurry; and pumping the coal water slurry to a Texaco furnace for high-temperature gasification so as to realize harmless treatment. Through addition of the flocculating agent, the settleability of the oily sludge is improved, and oil water obtained after press filtration can be reused; the dehydrated and dried oily sludge becomes smaller in size, and since the oily sludge is solid when applied preparation of the coal water slurry, influence of theoily sludge on the viscosity of the coal water slurry is reduced; and the treated oily sludge has good combustion heat, and produced heat energy has substantial economic benefits.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste treatment, in particular to a method for harmless treatment of dehydrated coal slurry of oily sludge. Background technique [0002] Oily sludge is a kind of suspending emulsion liquid, viscous, high viscosity and difficult to settle, very stable in nature, with the characteristics of large production volume, high oil content and difficult treatment. Oil mining, transportation, refining and oily sewage treatment plants produce a large amount of oily sludge. If it is discharged without effective treatment, it will pollute the surrounding soil, water and air. The oily sludge also contains a large number of pathogenic bacteria and heavy metals. Hazardous substances are very harmful to human health. Oily sludge belongs to the hazardous waste specified in the "National Hazardous Waste List". my country clearly stipulates that arbitrary discharge is not allowed. Therefore, oily sludge has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/12C02F11/00C10J3/46C10L1/32C10L1/24
CPCC02F11/00C02F11/12C02F11/122C02F11/14C02F2303/06C10J3/46C10J2300/0923C10J2300/093C10J2300/0973C10L1/2437C10L1/326
Inventor 邱松李昕阳杨芳芳魏令勇
Owner CHINA PETROLEUM & CHEM CORP
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