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Method for tempering oily sludge blended with coal water slurry

A technology of oil sludge and tempering, applied in chemical instruments and methods, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve the problem of large impact on the process stability of the pulping system, coal water slurry Problems such as poor pulping characteristics and poor system uniformity, to achieve high industrial application value, improve operation stability, and ensure flow performance

Active Publication Date: 2014-08-13
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the fact that oil sludge is directly added to the existing coal-water slurry pulping system due to its wide source, complex composition, poor system uniformity, poor dispersion ability and containing a large amount of colloid and macromolecular organic components. It will cause disadvantages such as poor slurrying characteristics, high viscosity, serious wear and tear on gasification burner, poor stability, and great impact on the stability of the pulping system process of the coal-water slurry mixed with oil sludge. Oil sludge pretreatment quenching method added to existing coal-water slurry pulping system

Method used

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  • Method for tempering oily sludge blended with coal water slurry
  • Method for tempering oily sludge blended with coal water slurry

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Take the “three sludge” produced in the sewage workshop of an oil refinery in northern Shaanxi and the oil sludge at the bottom of the crude oil sedimentation tank of an oil extraction plant in northern Shaanxi at a mass ratio of 1:6 as an example. The initial water content is 60% and the oil content is 30% of similar substances, 10% mud content, the specific quenching and tempering method is as follows:

[0022] 1. Reduce and separate oily sludge

[0023] Such as figure 1 As shown, the sludge pump 1 is injected into the sludge thickening tank 2, and 0.3% of the oily sludge mass is added to the zwitterionic polyacrylamide with a weight average molecular weight of 10,000 Daltons for sedimentation and separation. After standing for 6 hours, the The water in the upper part of the sludge thickening tank 2 is separated and re-injected to the sewage treatment plant for treatment. The lower water-containing sludge is mixed with the conditioner and enters the horizontal screw centr...

Embodiment 2

[0028] Take the oil sludge at the bottom of the crude oil sedimentation tank at an oil production plant in northern Shaanxi as an example. The initial water content is 35%, the oil content is 40%, and the mud content is 25%. The specific tempering method is as follows:

[0029] 1. Reduce and separate oily sludge

[0030] Such as figure 1 As shown, the sludge pump 1 is injected into the sludge thickening tank 2, and 0.3% of the oily sludge mass is added to the zwitterionic polyacrylamide with a weight average molecular weight of 1400 Dalton for sedimentation and separation. After standing for 10 hours, the The water in the upper part of the sludge thickening tank 2 is separated and then reinjected to the sewage treatment plant for treatment. The lower water-containing sludge is mixed with the conditioner and enters the horizontal screw centrifuge 3 for solid-liquid separation. The conditioner has a weight average molecular weight of 18,000. Denton's acrylamide-dodecafluoroheptyl me...

Embodiment 3

[0035] In the step 1 of the reduction and separation treatment of oily sludge in Example 1, the modifier used was acrylamide-perfluorobutyl acrylate copolymer with a weight average molecular weight of 6000 Daltons, and polyether polyol DL-400D , The cationic polyacrylamide with a weight average molecular weight of 10000 Daltons is replaced by a mixture with a mass ratio of 10:5:2, and the added amount is 5.0% of the mass of the water-containing sludge. The other steps of this step are the same as in Example 1, and the Treat sludge. In the ultrasonic-assisted conditioning step 2, the viscosity and friction reducing aid used is replaced with a mixture of pentaerythritol caprylate, poly-α-olefin, and di-tert-alkyl polysulfide TPS60 in a mass ratio of 3:10:2. The added amount is 0.5% of the mass of the sludge to be treated, and the other steps of this step are the same as in Example 1, to obtain the refined sludge.

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Abstract

The invention discloses a method for tempering oily sludge blended with coal water slurry. A fluorine-containing water-soluble macromolecule copolymer and a surfactant are dorpwise added for tempering treatment in the oily sludge centrifugal reduction treatment process; polyol ester lubricating oil, a polysulfide lubricating oil and a polyolefin drag reducing agent are added into the oily sludge subjected to the reduction treatment; and ultrasonically intensified mass transfer dispersion is carried to finally obtain the tempered oily sludge. The oily sludge tempering equipment needed in the method is simple, the treatment efficiency is high, the tempered oily sludge can be directly added into a conventional coal water slurry preparation system for preparing coal water slurry which has relatively high slurry concentration, good flowability and relatively good slurry preparation stability; therefore, relatively high industrial application values are achieved, meanwhile a guarantee is provided for harmless treatment and resource utilization of the oily sludge, and remarkable comprehensive economic and environmental-friendly benefits are achieved.

Description

Technical field [0001] The invention belongs to the technical field of oily sludge treatment, and specifically relates to an oily sludge conditioning treatment method that can be used for blending with coal water slurry. Background technique [0002] Coal-water slurry is a new, efficient and clean coal-based fuel that is physically ground and mixed in a certain proportion of coal, water and additives. It has the characteristics of high combustion efficiency and low pollutant emissions, and can be used in power station boilers. , Industrial boilers and industrial kilns replace oil, gas, and coal combustion are an important part of today's clean coal technology. In my country, coal-water slurry is mainly used for pressurized coal gasification to prepare synthesis gas and then for the synthesis of ammonia and methanol industry, and is the leader of the coal chemical industry. Coal water slurry requires a good pulping process, and the prepared coal water slurry needs to have a highe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/00C10L1/32
Inventor 杨东元扈广法齐永红王燕李霁阳许磊姚彬
Owner SHAANXI YANCHANG PETROLEUM GRP
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