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Recovery treatment method of waste oil sludge

A technology for recycling and processing oil sludge, which is applied in the field of recycling and processing waste oil sludge and waste oil sludge, and can solve the problems of difficulty in achieving oil-water separation effect, high processing cost and poor processing effect.

Active Publication Date: 2021-11-30
GUANGZHOU S SUNNY ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many recycling methods, they have not been widely promoted due to shortcomings such as poor pertinence, poor treatment effect, high treatment cost, and inability to meet the requirements of harmless treatment.
Similarly, it is difficult to achieve a good oil-water separation effect by conventional methods such as heating, demulsifier, mechanical stirring, and ultrasonic waves.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The preparation method of the sodium silicate composition is: stirring and mixing sodium silicate, sodium bicarbonate, sodium dihydrogen phosphate, disodium edetate and nitrilotriacetic acid, and then adding fatty alcohol polyoxyethylene Ether and demulsifier are stirred and mixed uniformly to obtain a sodium silicate composition;

[0030] 2) Primary oil extraction: Add the waste oil sludge and sodium silicate composition into hot water, mix and stir evenly, and after standing still, obtain the primary oil-rich liquid located in the upper layer and the primary water-rich liquid located in the lower layer, and then carry out oil-water separation treatment After the oil-water separation treatment is completed, the separated primary oil-rich liquid and primary water-rich liquid are obtained, and then the primary water-rich liquid is subjected to pressure filtration, and the separated primary waste water and primary filter residue are obtained after the pressure filtration i...

Embodiment 1

[0064] A kind of recovery processing method of waste oil sludge in embodiment 1, comprises the following steps carried out in sequence:

[0065] 1) Preparation of sodium silicate composition: the sodium silicate composition is made of various raw materials, and the raw materials of the sodium silicate composition include: 100 parts by mass of sodium silicate, 5 parts by mass of sodium bicarbonate, 2 parts by mass of sodium dihydrogen phosphate, 0.3 parts by mass of disodium edetate, 0.2 parts by mass of nitrilotriacetic acid, 3 parts by mass of fatty alcohol polyoxyethylene ether, and 3 parts by mass of demulsifier;

[0066] The preparation method of the sodium silicate composition is: stirring and mixing sodium silicate, sodium bicarbonate, sodium dihydrogen phosphate, disodium edetate and nitrilotriacetic acid, and then adding fatty alcohol polyoxyethylene Ether and demulsifier are stirred and mixed uniformly to obtain a sodium silicate composition;

[0067]2) Primary oil e...

Embodiment 2

[0082] A kind of recovery processing method of waste oil sludge in embodiment 2, comprises the following steps carried out in sequence:

[0083] 1) Preparation of sodium silicate composition: the sodium silicate composition is made of various raw materials, and the raw materials of the sodium silicate composition include: 100 parts by mass of sodium silicate, 10 parts by mass of sodium bicarbonate, 5 parts by mass of sodium dihydrogen phosphate, 0.2 parts by mass of disodium edetate, 0.3 parts by mass of nitrilotriacetic acid, 2 parts by mass of fatty alcohol polyoxyethylene ether, and 5 parts by mass of demulsifier;

[0084] The preparation method of the sodium silicate composition is: stirring and mixing sodium silicate, sodium bicarbonate, sodium dihydrogen phosphate, disodium edetate and nitrilotriacetic acid, and then adding fatty alcohol polyoxyethylene Ether and demulsifier are stirred and mixed uniformly to obtain a sodium silicate composition;

[0085] 2) Primary oil...

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Abstract

The invention provides a recovery treatment method of waste oil sludge, which comprises the following steps: preparing a sodium silicate composition from the following raw materials in parts by mass: 90-110 parts of sodium silicate, 5-10 parts of sodium bicarbonate, 2-5 parts of sodium dihydrogen phosphate, 0.2-0.5 part of disodium ethylene diamine tetraacetate, 0.2-0.5 part of nitrilotriacetic acid, 2-4 parts of fatty alcohol-polyoxyethylene ether and 2-5 parts of a demulsifier; and then mixing waste oil sludge, the sodium silicate composition and hot water for primary oil extraction, then mixing primary filter pressing residues, the sodium silicate composition and hot water for secondary oil extraction, then dehydrating, decolorizing and drying primary oil-rich liquid and secondary oil-rich liquid, performing wastewater treatment on primary wastewater and secondary wastewater, and subjecting the secondary filter pressing residues to pyrolysis treatment. The oil product recovery rate exceeds 97 wt%, and water is discharged after reaching the standard.

Description

technical field [0001] The present invention relates to the technical field of resource recovery and treatment of waste oil sludge, in particular to a recycling and treatment method of waste oil sludge, especially to a treatment method of water-insoluble (oil-based) waste oil sludge, and the present invention is mainly used for cutting fluid Treatment of waste sludge. Background technique [0002] Cutting fluid (coolant) is an industrial liquid used to cool and lubricate cutting tools and workpieces during metal cutting and grinding, and to lubricate and cool the cutting process in metal processing or machine manufacturing. , cleaning, antirust and other functions. [0003] After the cutting fluid is recycled for a period of time in the process of metal processing and machinery manufacturing, bacteria in the air or bacteria from other places will multiply in the cutting fluid, resulting in a continuous decline in the quality of the cutting fluid and turning it into waste cu...

Claims

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Application Information

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IPC IPC(8): C10M175/00C02F11/00C02F11/10C02F9/06C02F103/16
CPCC10M175/0016C10M175/0025C10M175/00C02F11/00C02F11/10C02F9/00C02F1/4672C02F1/66C02F1/52C02F1/001C02F2001/007C02F1/78C02F1/725C02F1/461C02F1/40C02F2103/16Y02W10/40
Inventor 李小琴魏完星徐成龙姚谋清钟洋卢紫君邹超鹏
Owner GUANGZHOU S SUNNY ENVIRONMENTAL PROTECTION TECH CO LTD
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