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Method for oil sludge tempering and solidification pelletizing

A sludge, conditioning technology, applied in the methods of granulating raw materials, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of difficult to form solidification, unstable shape, complex components, etc., to improve mutual solubility and adsorption. The effect of improving the compatibility, improving the oil removal rate

Active Publication Date: 2016-04-20
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the above-mentioned deficiencies in the prior art, the object of the present invention is to overcome oil sludge which contains certain water and oil, complex components, poor system uniformity, unstable shape, poor dispersion ability and contains a large amount of colloid and macromolecular organic matter components, Direct mixing and granulation with coal powder, coke powder, etc. is not easy to form and solidify, and cannot be effectively granulated. It provides a method that can directly solidify oil sludge with coal powder, coke powder and other powder materials after conditioning and modification. Method of molding and granulating

Method used

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  • Method for oil sludge tempering and solidification pelletizing

Examples

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Embodiment 1

[0027] Taking the "three muds" produced in the sewage workshop of an oil refinery in northern Shaanxi and the oil sludge at the bottom of a crude oil settlement tank of an oil production plant combined station in northern Shaanxi mixed at a mass ratio of 1:6 as an example, the initial water content is 65%, and the oil content is 65%. 30% of similar substances and 5% of mud content. The specific tempering and granulation method is as follows:

[0028] 1) Reduction, separation and treatment of oily sludge

[0029] Inject the sludge into the sludge thickening tank with a mud pump, and add cationic polyacrylamide with a weight average molecular weight of 15,000 Daltons of 1% of the oily sludge mass for sedimentation and separation. After standing for 6 hours, separate the oil and water in the upper part of the sludge thickening tank After that, it is reinjected to the sewage treatment plant for treatment, and the lower part of the water-containing oil sludge is mixed with a floccu...

Embodiment 2

[0036] Taking the oil sludge at the bottom of a crude oil settlement tank at an oil production plant union station in northern Shaanxi as an example, the initial water content is 40%, the oily substance content is 30%, and the mud content is 30%. The specific conditioning and granulation methods are as follows:

[0037] Reduction, separation and treatment of oily sludge

[0038] Inject the sludge into the sludge concentration tank with a mud pump, and add 0.1% of the mass of the oily sludge to the zwitterionic polyacrylamide with a weight-average molecular weight of 10,000 Daltons for sedimentation and separation. After standing for 8 hours, remove the oil and water from the upper part of the sludge concentration tank After separation, it is re-injected to the sewage treatment plant for treatment. The lower part of the water-containing oil sludge is mixed with a conditioner and then enters a horizontal screw centrifuge for solid-liquid separation. The flocculant is acrylamide-m...

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Abstract

The invention discloses a method for oil sludge tempering and solidification pelletizing. The method comprises the steps that oil sludge is injected into an oil sludge concentration pot to be subjected to demulsification, flocculation, settling and separation, oil sludge containing water on the lower portion and a flocculation modifying agent are mixed and then enter a horizontal type spiral centrifugal machine to be separated, separation liquid enters a pressure filter to be filtered under pressure, an obtained filter cake and an oil sludge cake obtained through centrifugal separation are mixed to be used as oil sludge to be treated, and the oil sludge, a solidifying agent and a tempering addition agent are mixed to form an uniform-form material to be added into a pelletizer to be pelletized. The compatibility and miscible adsorbability are improved, a guarantee is provided for harmless treatment and resource utilization of oil sludge, and economic and environmental protection comprehensive benefits are remarkable.

Description

technical field [0001] The invention belongs to the technical field of oily sludge treatment, and in particular relates to a method for tempering, solidifying and granulating oily sludge. Background technique [0002] Oily sludge is a stable colloidal system composed of petroleum and other organic matter, water, and sediment. The organic matter in it contains not only heavy crude oil, semi-finished residue oil, and refined oil, but also a large amount of condensed aromatic hydrocarbons and harmful microorganisms. Oily sludge is accompanied by every link of crude oil extraction, refining, collection and transportation. Its quantity is huge. According to incomplete statistics, the annual output of all kinds of oil sludge in my country is as high as 30 million tons. Because it contains a large amount of unseparated crude oil, microorganisms, heavy metals, benzene series and other toxic and harmful substances, it is very harmful to human body and environment. It is listed as sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/00C02F11/12
CPCB01J2/00C02F11/12C02F2303/06
Inventor 杨东元扈广法齐永红王燕段志阳刘鹏许磊李霁阳王青屈文婷任蕊
Owner SHAANXI YANCHANG PETROLEUM GRP
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